BrillianceCT Air v1-2-5 CalibrationManual [PDF]

Zitiervorschau

Brilliance™ CT 6-slice, 10-slice, 16-slice, 16 Power Version 1.2.5 Model: 4535 670 73191, 4535 670 73181, 4535 670 78851 and 4535 670 05721 Calibration Manual

453567087021 Revision D

This document and the information contained in it is proprietary and confidential information of Philips Medical Systems (“Philips”) and may not be reproduced, copied in whole or in part, adapted, modified, disclosed to others, or disseminated without the prior written permission of the Philips Legal Department. Use of this document and the information contained in it is strictly reserved for current Philips personnel and Philips customers who have a current and valid license from Philips for use by the customer’s designated in-house service employee on equipment located at the customer’s designated site. Use of this document by unauthorized persons is strictly prohibited. Report violation of these requirements to the Philips Legal Department at 22100 Bothell Everett Highway, Bothell, WA 98021. This document must be returned to Philips when the user is no longer licensed and in any event upon Philips’ first written request.

© 2005 Philips Medical Systems

Philips Medical Systems 2005 Koninklijke Philips Electronics N. V. All Rights Reserved.

Warranty Disclaimer PHILIPS PROVIDES THIS DOCUMENT WITHOUT WARRANTY OF ANY KIND, EITHER IMPLIED OR EXPRESSED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Limitation of Liability Philips has taken care to ensure the accuracy of this document. However, Philips assumes no liability for errors or omissions and reserves the right to make changes without further notice to any products herein to improve reliability, function, or design. Philips may make improvements or changes in the product(s) or program(s) described in this document at any time.

Symbol descriptions

Attention Symbol.

Radiation Warning Symbol.

Laser Warning Symbol.

Biohazard Warning Symbol.

Magnetism Warning Symbol.

Projectile Warning Symbol.

Electrical Warning Symbol.

Do Not Touch

Revision history Revision

Date

Comments

-1

08/13/2004

-2

08/27/2004

Review changes incorporated (Desk Top Review), More complete detailed process for next revision.

A

09/10/2004

Review changes incorporated, ready for signoff and release.

B

09/21/2004

Include model - Private Practice Cardiovascular Configuration.

C

02/15/2005

Update the manual with radiation warnings and review changes.

D

05/13/2005

Update manual for version 1.2.5 software, ready for signoff and release.

Preliminary Review of Version 1.2

Safety Information To the User of This Manual The user of this manual is directed to read and carefully review the instructions, warnings and cautions contained herein prior to beginning installation or service activities. While you may have previously installed or serviced equipment similar to that described in this manual, changes in design, manufacture or procedure may have occurred which significantly affect the present installation or service.

Installation and Environment Except for installations requiring certification by the manufacturer per federal standards, see that a radiation protection survey is made by a qualified expert in accordance with NCRP 102, section 7, as revised or replaced in the future. Perform a survey after every change in equipment, workload, or operating conditions which might significantly increase the probability of persons receiving more than the maximum permissible dose equivalent.

Diagnostic Imaging Systems - Mechanical-electrical Warning All of the moveable assemblies and parts of this equipment should be operated with care and routinely inspected in accordance with the manufacturer’s recommendations contained in the equipment manuals. Only properly trained and qualified personnel should be permitted access to any internal parts. Live electrical terminals are deadly; be sure line disconnects are opened and other appropriate precautions are taken before opening access doors, removing enclosure panels, or attaching accessories. Do not under any circumstances, remove the flexible high tension cables from the x-ray tube housing or high tension generator and/or the access covers from the generator until the main and auxiliary power supplies have been disconnected. Failure to comply with the above may result in serious or fatal bodily injuries to the operator or those in the area.

Electrical-grounding Instructions The equipment must be grounded to an earth ground by a separate conductor. The neutral side of the line is not to be considered the earth ground. On equipment provided with a line cord, the equipment must be connected to properly grounded, three-pin receptacle. Do not use a three-to-two pin adapter.

Diagnostic Imaging Systems - Radiation Warning X-ray and Gamma-rays are dangerous to both operator and others in the vicinity unless established safe exposure procedures are strictly observed. The useful and scattered beams can produce serious or fatal bodily injuries to any persons in the surrounding area if used by an unskilled operator. Adequate precautions must always be taken to avoid exposure to the useful beam, as well as to leakage radiation from within the source housing or to scattered radiation resulting from the passage of radiation through matter. Those authorized to operate, participate in or supervise the operation of the equipment must be thoroughly familiar and comply completely with the current established safe exposure factors and procedures described in publications, such as: Subchapter J of Title 21 of the Code of Federal Regulations, "Diagnostic X-ray Systems and Their Major Components", and the national council on radiation protection (NCRP) no. 102, "Medical X-ray And Gamma-ray Protection For Energies Up To 10 Mev-equipment Design and Use", as revised or replaced in the future. Those responsible for planning of x-ray and gamma-ray equipment installations must be thoroughly familiar and comply completely with NCRP no. 49, "Structural Shielding Design and Evaluation For Medical Of X-rays and Gamma-rays of Energies Up to 10 Mev", as revised and replaced in the future. Failure to observe these warnings may cause serious or fatal bodily injuries to the operator or those in the area.

CONTENTS BRILLIANCE TM CT IMAGE CALIBRATION SOFTWARE 1.2.5_REV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Running the Image Calibration Selector Software - Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Calibration Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Brilliance TM CT Recommended Calibrations Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phantom Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Starting the Calibration Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Load Recovery Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Results Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Load Grid Voltage Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Filament Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rotor Balance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Additional Notes on Rotor Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bad Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alternate Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XRT Mechanical Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Z-mechanical Alignment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-mechanical Alignment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-Plane Z-Mechanical Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XRT FS Width Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XRT DFS Position Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XRT SFS Position Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ultra High Resolution Comb Align Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . XRT Ultrahigh DFS Position Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Phantom Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HCOR (Hounsfield Correction) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Basic HCOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Auto Calibration Reasons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Laser Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Interior Scan Frame Lasers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Cover Lasers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Loading A-plane Calibration Constants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 1 2 3 4 6 7 8 9 10 10 14 14 17 21 22 23 24 28 29 31 34 41 45 48 52 55 60 64 64 69 70 70 70 71

Testing for Skew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adding Shim(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Calibrations Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Detector Array Skew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Patient Support Horizontal Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Patient Support Vertical Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Main Drives and Angulation Setup for Original MDP & TDP Systems, also Setup for GMP Equip Systems . . . . . . . . . . . . . Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (MDP & TDP Systems) Equipment Required: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (GMP Equip Systems) Equipment Required: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Angulation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Procedure Main Drive Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (MDP & TDP Systems) Tilt Actuator Lift Switch Settings (No Tilt in CVCT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (GMP Equip Systems) Tilt Actuator Lift Switch Settings (No Tilt in CVCT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lift Switch and Tilt Circuit Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tilt Limit Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Testing E-Stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CT Box and Gantry Controls/Couch Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

72 76 78 79 79 81 83 87 87 87 87 87 87 88 89 94 95 96 96 97 98

BRILLIANCE TM CT IMAGE CALIBRATION SOFTWARE 1.2.5_REV. Running the Image Calibration Selector Software - Introduction The Image Calibration Selector application uses a graphical user interface (GUI) which allows you to perform selected calibration scans or Automatic Calibrations based on reasons selected. Depending on the calibration step selected, the software will do one or all of the following: (a) Write a calibration table to disk, (b) Advise the user to make a mechanical adjustment, (c) Perform automatic adjustment and rescan (d) Write control parameters to configuration files (e) Provide neutral feedback on status of calibration. NOTE: A general recommendation for all calibrations is a tube heat of >30%. Some procedures in this document may indicate other specific tube heat values. The Tube Warm-up process is an automatic process build into the Image Calibration Software.

NOTE

05/13/2005

The initial system calibrations should be completed before any image calibrations. The following phantoms are required for calibration:

•

Calibration (Eye) Phantom (455012001031). This is used for some XRT Calibrations, Phantom Calibration and Detector Displacement Calibration.

•

System Phantom (455012001021). This is used for HCOR Calibration. Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1-1

Calibration Sequence The sequence of calibration steps should be followed in the order specified by the Image Calibration Selector. Each subsequent calibration shall not be performed until the previous step has completed successfully, unless specific instructions are given to iterate again the process. A calibration step shall be successfully completed when all of the following are true: In Service Level: •

No error message (error dialog box) has been displayed.

•

A prompt indicating the end of the selected calibration step has been displayed.

•

If the calibration step is iterative (such as some XRT calibrations), then the iteration advice must indicate that convergence has been achieved and no further iterations are required.

• Any prompted user interaction such as data entry has been completed, and prompting dialog boxes are no longer present. If any of the above conditions are not satisfied, the entire calibration step should be repeated. If an error dialog has been displayed, then appropriate action should be taken to remedy the error before repeating the calibration step. Some typical error situations are given below. Error Situation Missing calibration tables Error during data calculations

Possible Reason for the Error Calibration was performed out of sequence - Scan of incorrect or misaligned phantom - Dependent (previous) calibrations no longer valid - Incorrect Scan Protocol - Inconsistent Data

Calibration Can Interface During this Image Calibration procedure the processes are automatic. Example: The rotor will position itself for XRT Mechanical Alignment. During the Calibration process the FSE may need to send manual commands to the Gantry. Use the Calibration Can Interface to manually send Can Commands during calibration. (example:) rotor_position _0, or panel_zero.

NOTE

05/13/2005

The Calibration Can Interface is available under Home > Utilities > Calibration.

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1-2

BRILLIANCE TM CT RECOMMENDED CALIBRATIONS MATRIX The following calibration steps are recommended to be done following any of the listed service procedures. The calibration steps have to be run in the order listed from left to right. This can be complete via the selective calibration process or the automatic process by selecting the appropriate reason in the Image calibration selector window. Software Rev 1.2.5 Brilliance TM CT Reasons

Load Grid Filament Voltage Cal Defaults

Rotor Balance

Bad Detector Cal

XRT Mechanical Align

A Plane Z- XRT FS- XRT DFS- XRT SFS- Phantom Mechanical Width Position Position Cal Align Cal Cal Cal

Air Cal HCOR Cal

New System Installation

x

x

x

x

x

x

x

x

x

x

x

x

Tube Replacement

x

x

x

x

x

x

x

x

x

x

x

x

Generator Replacement

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

x

DMS Replacement

x

x

A-Plane Collimator Replacement Detector Module Replacement

x

x x

x

UHR Comb Replacement Routine Scheduled Calibration

05/13/2005

x x

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

x

x

x

1-3

PHANTOM PLACEMENT Before starting most calibrations, the Calibration (Eye) Phantom (455012001031) must be placed in the holder with the pin attached in the upper hole on the front surface of the phantom. The phantom must be positioned so the inner lasers align with the notch between the tall phantom section and the metal holder clamp. Press the zero button to set the couch position to zero. It is very important that the couch is properly zeroed. From isocenter position move the couch such that the pin is 5cm down for vertical positioning, See Figure 2. After that, the calibrations will automatically position to the required couch position based on the type of calibration selected. Reminder advice will be presented at the beginning of each calibration indicating that the couch should have been zeroed on the phantom notch. If the zero procedure has already been performed and is still accurate, then the zeroing does not need to be repeated. Refer to Figure 2 for placement of the Calibration Eye Phantom (455012001031). If the phantom is not properly positioned for the given calibration, then the calibration routine shall advise how the phantom must be repositioned. The Phantom Calibration step would then have to be repeated. If running auto calibration, it would recover to the start of the Phantom Calibration. In order to more quickly verify correct phantom positioning before restarting the Full Phantom Calibration procedure, the user may choose to use a Select Phantom Calibration, and select only a Phantom 1 and Phantom 2 scan pair (same scan parameters) and use those two scans to manually invoke Phantom Calibration via the Calibration Interface. If the calibration completes successfully, then the phantom positioning passes the internal verification tests. This approach is only valid if the static air calibration was recently performed (it is done at the start of Full Phantom Calibration). HCOR Cals and some performance calibrations use the System Phantom (455012001021), it also has a notch in the body section to aid in zeroing. COPPER WIRE

Section 1 PHYSICS LAYER

Section 2 WATER LAYER

45

HEAD PHANTOM

Section 3 MULTI-PIN LAYER

BODY PHANTOM

FIGURE 1 Diagram of the System Performance Phantom

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1-4

FIGURE 2 Eye Calibration Phantom (455012001031)

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1-5

STARTING THE CALIBRATION PROGRAM 1. Log in as philips_service (password: service_only). 2. Close ESTOP by turning on keyswitch, if necessary Start

the Scanner Application from the desktop icon: 3.

After scanner application launch is completed. End study and close viewer Click Home>Utilities>Calibration

4.

From the Calibration menu pull down, click on “Selective Calibration” which will start the Image Calibration Selector as seen in Figure 3.

5.

From the “Calibration” main menu, The calibrations sequence listed in this Selector is the recommended sequence in which calibrations should be run. The recommended sequence starts from (Load Grid Voltage Defaults) and ends at (HCOR).

05/13/2005

FIGURE 3 Calibration Scan Selector

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1-6

LOAD RECOVERY FUNCTIONALITY Recovery from errors is a feature that allows a calibration sequence to be resumed from the point it was previously interrupted due to error or a manual cancel command. When there was a previous error, the calibration application starts in recover mode the next time. The failed step is highlighted in red. • Clicking on ”Start Calibrations” recovers and resumes calibration from the failed point. • When any other calibration is selected, the load recovery button flashes indicating the presence of a recovery step. • Clicking on the button gets you back to the above described state. • Proceeding with the alternate selection overrides the recovery step. The recovery prompt displayed is as follows:

FIGURE 4 Recovery Prompt This is a valuable feature as it saves time when errors are encountered on long calibration sequences like Full Air Calibrations, phantom calibrations or auto calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1-7

Diagnostic Mode

Diagnostic Mode provides some additional capabilities like displaying plots, overriding default settings and bypassing certain steps. These advanced capabilities will be useful in specific diagnostic scenarios, that deviate from normal operating sequences. This mode should be used only if appropriately trained. Diagnostic Mode button is located at the bottom of the Calibration Selector GUI. When checked, the following warning is displayed. The user should click ‘OK’ to operate in this mode only if familiar with the feature.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1-8

Results Functionality To monitor the calibration process, click on “Results” arrow button to display screen. The current “Results” window will show details of the current calibration in process.

Past Calibration results can be viewed by clicking ”Past Results” button. This function is helpful if errors occur during calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1-9

CALIBRATION PROCEDURES LOAD GRID VOLTAGE DEFAULTS A Graphical User Interface (GUI) is available to make the grid voltage entries into the configuration files of scanner software. The Selector is launched by selecting the option “Load Grid Voltage Defaults” at the top of the list in the Image Calibrations Selector and then clicking the “Start Calibrations” button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 10

Select to Load Default

1.

From the “Load Default” screen, select the hard drive (HD). If the default grid voltages have already been saved to the hard disk from an earlier tube installation. NOTE

For a new tube installation, use the CDROM (CD) option to load the default grid voltages provided by the tube manufacturer on the appropriate storage media. A copy of the default grid voltage file will be stored on the hard disk (HD) during this step for subsequent loading of default grid voltage values. Also (Edit) selection lets you load grid voltages manually from the X-ray tube label, if no file is available.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 11

2.

The default grid voltage values are automatically loaded. Press Ok at the prompt to complete the step.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 12

3.

If the grid voltage defaults file on the hard disk is corrupt or the media is unavailable. Select Edit in the load default prompt. Take the values from the X-ray tube label and enter voltages in the Default Grid Voltage Entry. Enter tube serial # (number) and tube type and the date.

4.

Select the “Save & Exit” button to load and store the default grid values.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 13

FILAMENT CALIBRATION Procedure The Filament Calibration uses the Undeflected grid voltages. Default grid values are supplied by the tube manufacturer and loaded on Floppy or CD. 1.

From Image Calibration Selector, select the Filament Calibration and click on “Start Calibrations” button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 14

2.

The Filament screen appears, follow the instructions on screen and select Ok on the user prompt to proceed.

WARNING

X-RAY AND GAMMA-RAYS ARE PRESENT DURING THIS PROCEDURE.

3.

Wait, the system will begin initializing throughout the filament calibrations.

4.

To see current results, select the “Results” arrow to view each station (mA spot size) being calibrated. Note for each station (mA spot size) you will get a succeed and proceed to next station.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 15

When calibration is complete the status will show “completed”. Return to Image Calibration Selector to select the next calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 16

ROTOR BALANCE TEST Rotor Balance Test is a procedure to measure rotor frame imbalance. This is accomplished by performing a 50 - revolution acquisition and analyzing angular position data. Additional Notes on Rotor Balancing are available (refer to page 23). The steps for performing the Rotor Balance procedure via the Selective Calibration Selector application are as follows: 1.

Select Rotor Balance Test, Click on the “Start Calibration” button.

2.

A message box will appear that reads, zero the couch with scan laser at notch on phantom (or at front of couch if no phantom present). Follow the instructions on screen and click Ok on the user prompt to proceed.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 17

3.

The system will continue with the rotor balance test. Press the “Enable” button during positioning.

4.

When the scan is completed, message boxes will appear after several seconds with the results of the rotor balance test. If imbalance is more than 7 ft.-lb. (31.13 N/m), advice will be given for amount and station for placement of additional weight on the front or rear of the rotor. NOTE

In the philips_service mode, the Rotor Balance Scan is done with no X-rays. There may be a significant delay (over a minute) after scan completion as a large quantity of data is transferred form CIRS to HOST. It may appear as if nothing is happening. To view the result and images even after the rotor is in balance, the diagnostic mode has to be enabled.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 18

The result provides two closest options, just in case one of the stations cannot be adjusted as recommended. If the rotor is not balanced, the message box will inform the user the amount of imbalance and the angular direction in degrees in which the imbalance exists. It locates the nearest mechanical weight station where weights can be added or removed to balance the rotor and indicates the amount of weight required. In philips_service, the rotor is automatically stopped and position to 0. 05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 19

Follow the advice of the message box. When the weight has been added, Click Ok and continue. In addition to the result dialog, an image is displayed of the front or rear of the gantry to indicate the locations of the mechanical weight stations.

FIGURE 5 Weight Placement NOTE

5.

If 3/8”-16 bolt torque to 30 ft.-lbs. (40.67 Nm) and use loctite #242 or If 1/2”-13 bolt torque to 56 ft.-lbs. (75.92 Nm) and use loctite #242.

After placing weight on the rotor and restarting rotation, pressing Ok on the prompt will automatically iterate the calibration. This will complete the Rotor Balancing Test. Return to Image Calibration Selector to select the next calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 20

Additional Notes on Rotor Balancing The default rotor motion control mode is called ’senseless vector’ mode, a complex mode that uses servo control to maintain the required rotation speed within a tighter tolerance on the system. Rotor balance requires a special motion control mode called ’volts per hertz’ mode which is simpler by nature and is required to get accurate phase (angular direction) information of the rotor imbalance. The host has the control mode switching capability. Miscellaneous Notes about Rotor Balancing: 1. The calibration requires a 50 rev spiral which is a lot of data. Therefore there is a wait of several seconds after scan completion before you get the next prompt. This is normal. You need to wait for the change in prompts before proceeding. 2. While in ’volts-per hertz’ mode the braking characteristics are not as good as during the default mode. So you may hear the brakes squeak when you stop the rotor for adjustments. For the same reason, it is not advised to use a speed greater than 40 RPM while in this mode. (The belt squeals get significantly louder at the higher speeds and causes excess ware on the brakes). (*) 3. Previously balancing was done even before X-rays were turned on for the first time. Since we need a scan, Rotor Balance is performed after filament calibration (pre-heats). The Mechanical engineers have a default set of weights installed on the system which should have the system balanced close to spec. The Balance test should primarily be a verification, unless a modified version or a different rev of a large system component like the tube or generator is changed on the system. (newer tubes could be up to 9 lbs. heavier than some of the early tubes. The rotor balance calibration routine has been improved in current software releases. Subsequent rotor balance test may generate errors in the displayed output. These error will not effect the operation of the system, but rebalancing of the system is desirable. A balancing kit is available for correcting balancing errors. ( * ) Not just the braking issue. The accuracy of the results is greater at Lower RPMs

The General Purpose balance kit P/N 4535 670 21091. This will be used for most balance situations occurring in the field.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 21

BAD DETECTOR There is one pair of bad detector lists (a normal list and a special list including blocked channels from the ultra-high collimator comb). Both lists are generated at the same time. There should be no bad detectors on the default bad detector list during system installation. Adding bad channels to the list serves only as a temporary measure to mitigate image quality until a service engineer can replace bad channels. 1.

Select Bad Detector from the Image Calibration Selector, then click on the “Start Calibration” Button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 22

2. The system will continue with the Bad Detector test. To locate bad detectors, view the calibration pull down menu select diagnostic > bad segments > select operation (Manual) to view Bad Detection Elements.

WARNING

X-RAY AND GAMMA-RAYS ARE PRESENT DURING THIS PROCEDURE.

3. When the scan is completed, message box will appear.

Alternate Methods If the Automatic Bad Detector Calibration does not eliminate all Bad Detector Rings on the images: - Ring ID Diagnostic tool or Raw Data viewing tool (analysis or MATLAB Calibration Interface) to manually locate Bad Detectors and enter them on the Bad Detector Interface, view the manual method. Refer to the Diagnostic Manual for more information. This will complete the Bad Detector calibration. Return to Image Calibration Selector to select the next calibration. 05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 23

XRT MECHANICAL ALIGNMENT NOTE

1.

The two steps, XRT X-Mechanical and XRT Z-Mechanical alignment have been combined into a single step. Each iteration collects multiple scans to determine misalignment in both directions and advises accordingly. This helps reduce the number of times the tube mounting has to be loosened for adjustments, thereby reducing the time required for tube alignment.

From the Image Calibration Selector, select the XRT Mechanical Align and click on the “Start Calibration” Button. Make sure the couch has been properly zeroed.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 24

2.

The next screen appears, follow the instruction steps and continue the process.

3.

Make sure the couch has been properly zeroed, select Ok (wait scanning in process).

4.

Note the system will start with an initial warm-up and then proceed to an incremental warm-up process.

Note the message box that appears in the corner of the screen, setting the position value will occur through out this process and incremental warm-up process continues. 5.

Press enable during patient scan and continue the process,

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 25

6.

If the XRT Mechanical Alignment is in specifications the status will show completed. An In Spec result screen appears.

7.

If you need to view the alignments results, select the “Results” button to review the current results.

8.

If the tube is out of mechanical alignment, you will be prompted to make an adjustment.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 26

Mechanical adjustment advice is now also given in fractions of a turn (e.g., 3/8 of a turn). Rotor is positioned automatically when tube adjustment advice is given. Z-RPM value for A Plane is automatically set to 0 via the CAN Interface (non O-level) - Tube z-alignment must presume A Plane setting for 60 RPM is reasonable; this relies on the A Plane unit calibration, performed on a jig external to the gantry installation - A Plane Z-Mechanical calibration MUST be performed after XRT Mechanical tube adjustments (even if no XRT adjustment was made, 60 RPM value has been zeroed...)

WARNING

05/13/2005

ALWAYS SHUT DOWN THE ELECTRICAL POWER. HAZARDOUS VOLTAGES INSIDE WHILE WORKING ON EQUIPMENT WITH POWER ON. USE EXTREME CAUTION. FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH.

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 27

9.

Open If necessary, make the proper adjustment at the x-ray tube, according to the Mechanical Alignment Results window (see below for details) then iterate the program by selecting OK in the XRT Mechanical Alignment Result window until the calibration passes.

Z-mechanical Alignment Procedure 10. Open the front cover and remove the front cone. Loosen the four tube baseplate mounting bolts. Refer to Figure 8. 11. Loosen the two Z mechanical bolts as shown in Figure 9. This is necessary for the tube to move in the Z direction. 12. Adjust the mechanical position via the set screw. Turn the screw as indicated, refer to Figure 9.

FIGURE 8 Mechanical Alignment Adjustments 05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 28

SOCKET HEAD

TORQUE TO 4FT-LBS LOCTITE #222

CAP SCREW SOCKET HEAD CAP SCREW LOCKWASHER

Z-ADJUSTMENT STATIC BLOCK

Z-TUBE ADJUSTMENT SCREW (40TPI)

TUBE ADJUSTMENT LABEL

WASHER

BOTTOM Z-ADJUSTMENT PLATE

Z-ADJUSTMENT STRADDLE PLATE WASHER

TORQUE TO 10FT-LBS LOCTITE #242

Z-Mechanical Alignment Assembly FIGURE 9 Z-Mechanical Adjustment of X-ray Tube 13. The two baseplate screws must be tighten first to 15 in/lbs (1.964 N/m). Then tighten the loosened tube baseplate mounting bolts to 56 ft./lbs. (75.925 N/m).

WARNING

ALWAYS SHUT DOWN THE ELECTRICAL POWER. HAZARDOUS VOLTAGES INSIDE WHILE WORKING ON EQUIPMENT WITH POWER ON. USE EXTREME CAUTION. FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH.

X-mechanical Alignment Procedure 14. Open the front cover and remove the front cone. Loosen the four tube baseplate mounting bolts. Refer to Figure 8. 15. Loosen the two X mechanical bolts as shown in Figure 10. This is necessary for the tube to move in the X direction. 05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 29

16. Adjust the mechanical position via the set screw. Turn the screw as indicated, refer to Figure 10.

TORQUE TO 4FT-LBS LOCTITE #222

X-ALIGNMENT SCREW

X-DIRECTION SHIELD

TUBE X-ADJUSTMENT BLOCK

TORQUE TO 10FT-LBS LOCTITE #242

LOOSEN X MECHANICAL SCREWS

X-Mechanical Alignment Assembly FIGURE 10

X-Mechanical Adjustment

17. The two baseplate screws must be tighten first to 15 in/lbs (1.964 N/m). Then tighten the loosened tube mounting bolts to 56 ft./lbs. (75.925 N/m). 18. Iterate the test until it passes specification.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 30

A-PLANE Z-MECHANICAL ALIGNMENT This test utilizes the DMC Utility. There is one Z-position value of A-Plane Collimator blade position corresponding to each scan speed. The values are in micrometers and are initially set to zero during A-Plane collimator installation. 1.

From Image Calibration Selector, select the A Plane Z-Mechanical Calibration and click on “Start Calibration” button. Make sure the couch has been properly zeroed.

2. Select the rotation time(s) to be calibrated or select all (Default is all selected) in the screen and select “Start Scanning” to continue the process. 05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 31

3.

Follow the instruction steps inside the prompt and select Ok to continue the process. NOTE

WARNING 4.

It is very important to have the tube heat at a consistent percentage. Automatic warm-up will keep the tube as close to 50% as possible. Tube heat fluctuations can affect whether or not a test will continue to pass.

X-RAY AND GAMMA-RAYS ARE PRESENT DURING THIS PROCEDURE.

Open the current results screen to view the calibration sequence, it automatically iterates at a given scan speed until the A-Plane is aligned at that speed. The routine starts at 0 RPM (static) and proceeds to the next scan speed upon completion till all six scan speeds are completed. For each iteration, the test will display screen results “In Spec” or an “Out of Spec” screen with micrometers that the A-Plane collimator blades must move. If an error message appears, close out the error boxes, follow the screen and click on the “Recovery Loaded” button.

5.

Follow all the prompts until the “A Plane Z-Mechanical Alignment” status completed is displayed.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 32

6.

This will complete the A Plane Z-Mechanical Alignment. Return to the Image Calibration to select the next calibration. IMPORTANT NOTE The A-Plane calibration routine uses processed prep data instead of raw data for calculations. Some special Air calibrations with collimator blades wide open are used for this step. Therefore Air Calibrations MUST always be run before returning to clinical application, after completing A-Plane Z alignment step. Failure to do so will result in dark images from scans at certain settings. Refer to installation notes for details.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 33

XRT FS WIDTH CALIBRATION 1.

From Selective Calibration Selector, select the XRT FS Width Calibration and click on “Start Calibration” button.

2.

All scans will be selected. Click on the “Start Scanning” button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 34

3.

Follow the instruction steps inside the prompt and select Ok to continue the process. The system will perform several air calibrations and calculations.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 35

4.

Press Enable if prompted. Scanning will begin.

WARNING

5.

X-RAY AND GAMMA-RAYS ARE PRESENT DURING THIS PROCEDURE.

After the air scans and calculations are completed, the following prompt appears.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 36

6.

Follow the information within the user prompt. Open the Gantry to gain access to the Tungsten Slit. Remember to make sure rotor drives are disabled.

WARNING

05/13/2005

WARNING ELECTRIC TELLS THE USER THAT THERE IS A SPECIFIC ELECTRICAL HAZARD THAT CAN CAUSE HARM TO THE USER OR THE PATIENT. APPLY THE WARNING ELECTRIC STYLE.

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 37

FIGURE 11 Tungsten Slit NOTE This edge of the tungsten strip lines up with the edge of the tube shelf when bolted in the correct position as shown above. 7.

Use an allen key to loosen the screw, insert the tungsten slit into position and select Ok in the XRT FS Width user prompt.

8.

The calibration will automatically iterate through all cases.

9.

For each iteration, if measured focal spot width is outside the specified tolerance. (Large Spot:1.1 0.02mm Small Spot: 0.6 0.02mm)

10. If the tungsten slit was not properly positioned, you will receive an Data Validation screen. If the focal spot width is out of specification, the grid voltages are automatically adjusted to change the spot size to be within specification. Follow the information within the screen and select OK.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 38

Note the screen between incremental warm-up goes out and scanning begins. Follow the information within the screen and continue.

11. Remember to put the tungsten slit (X-ray Filter) back into its original position when finished. Select Ok.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 39

Refer to the Note Below

NOTE

For each iteration of all small spot cases, if the difference between the measured focal spot widths is within the tolerance range (0.04mm) the two spots will be changed such that their relative width difference is preserved to preserve the matched spot intensity.

The FS width calibration for small spots relaxes the width tolerance for small spots from +/- 0.04 mm when required to preserve focal spot intensity relationship, that was balanced during the previous air calibration step. The calibration step will error out if the spot width difference exceeds even the relaxed tolerance of 0.08. Whenever the tolerance is relaxed, it is indicated in the results window as “(Relaxed Width Spec: 0.06 mm +/- 0.04 mm)”. When the small spot tolerance has been relaxed to complete this calibration step, pay particular attention to the Impulse response and MTF test results for high and ultrahigh resolution cases during performance test done following calibrations. This will complete the XRT FS Width Calibration. Return to the Image Calibrations Selector to select the next calibration. 05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 40

XRT DFS POSITION CALIBRATION 1.

From Image Calibrations Selector, select the XRT DFS Position and click on “Start Calibration” button.

2.

All scans will be selected. Click on the “Start Scanning” button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 41

NOTE Make sure Tungsten slit is NOT covering beam at the start of this calibration. Calibration automatically does necessary Air Calibrations for all selected modes. This calibration will run nearly automatic, unless there is a problem with the scan data (e.g., “Pin offset too large” error)

3.

Follow the information within the prompt and select Ok (incremental warm-up begins). Make sure that the pin on the phantom is about 5cm offset from isocenter.

4.

The system will automatically iterate through the six cases. Each case starts with the corresponding air scan.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 42

WARNING

X-RAY AND GAMMA-RAYS ARE PRESENT DURING THIS PROCEDURE.

The air scans for small spot cases are again tested for Focal Spot intensity variations (small spot only) to verify that the difference in spot intensities remains below the specified limit after width calibration. 5.

After completing the air calibration step, the couch automatically positions to the pin section and continues with the pin scans.

6.

If the focal spot deflection is not within specification for the respective scan selection, the system will update the grid voltages and iterate the calibration until it in specification.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 43

NOTE There is one user prompt upon completion of each DFS mode; it asks if Single Focal Spot (SFS) grid values should be updated (to provide better starting point) - Select Yes to All, if you are running through the normal calibration sequence - Select No in the special case that you are “updating” DFS position calibration and you don’t plan on running SFS Position Calibration soon (choosing Yes could make SFS grid values worse). NOTE Intensity Calibration Failure If the check for spot intensity variation fails during DFS position air cals, the DFS position calibration step will end in an error instructing the user to repeat FS width and DFS position calibrations. This will complete the XRT DFS Position Calibration. Click Ok and return to the Image Calibrations Selector to select the next calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 44

XRT SFS POSITION CALIBRATION 1.

From Image Calibrations Selector, select the XRT SFS Position and click on “Start Calibration” button.

NOTE 2.

Calibration automatically does necessary Air Calibrations for all selected modes.

All scans will be selected. Click on the “Start Scanning” button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 45

3.

The system will automatically iterate through the six cases. Each case starts with the corresponding air scan.

WARNING

X-RAY AND GAMMA-RAYS ARE PRESENT DURING THIS PROCEDURE.

The air scans for small spot cases are again tested for Focal Spot intensity variations (small spot only) to verify that the difference in spot intensities remains below the specified limit after width calibration. 4.

Follow the instructions inside the user prompt, select Ok.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 46

The system is calculating, scanning with each parameters. 5.

After completing the air scans, the couch automatically positions to the pin section to continue with pin scans. The system will iterate through each of the six cases.

6.

If the focal spot deflection is not within specification for the respective scan selection, the system will update the grid voltages and iterate the calibration until it is in specification. This will complete the XRT SFS Position Calibration. Close the Results screen and return to the Image Calibrations Selector to select the next calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 47

ULTRA HIGH RESOLUTION COMB ALIGN CALIBRATION NOTE

The Brilliance 6 - slice configuration is an option only for the UHR.

1.

From Selective Calibration Selector, select the Ultrahigh Res Comb Align Calibration and click on “Start Calibration” button.

2.

Follow the instructions within the prompt.

3.

The system will perform air calibration and generate the required table. The system will then continue to the Ultra High Resolution Comb Align Calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 48

4.

If an error occurs. Follow the advice and restart the calibration.

5.

The calibration software will provide advice indicating if the scan was in specification after each iteration. The iterations need to be continued until the spot positions are within a tolerance of 2% about the specified spot positions for FS0 and FS1. The adjustment is recommended in terms of turns in micrometer units.

6.

When an UHR comb adjustment is required, the gantry stops rotation and positions the DMS at the bottom. Note that the DMS is being positioned at the bottom since the six bolts on the comb assembly are better accessed in this orientation.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 49

Take the backlash out of the micrometer first, then loosen the six allen screws that hold the UHR Collimator Comb assembly. Turning the micrometer screw gauge by the advised amount, as indicated. NOTE Advice for UHR adjustment is given both in mm and in ticks of the micrometer dial (1 tick = 10 microns). Before turning the micrometer, bolts holding the UHR assembly must be loosened to allow X-motion. Be careful to account for backlash in the dial. Be careful not to move the UHR comb when re-tightening the assembly. Adjustment: With the DMS at the top position, the micrometer is on the left. Negative direction, turning screw gauge downward, pushes the assembly to the right. Positive direction, turning screw gauge upward, loosens the micrometer so you can push the assembly to the left.

FIGURE 12 Micrometer on DMS 7.

Tighten the six allen screws to fasten the UHR collimator comb assembly and run the next iteration.

8.

If you get the In Spec result, the Ultra High Resolution Comb Align calibration is now complete.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 50

This will complete the Ultrahigh Res Comb Align Calibration. Close the Results screen and return to the Image Calibrations Selector to select the next calibration. NOTE

This step uses an enhanced algorithm that distinguishes between true balance and half detector-off position (which could also be falsely perceived as balanced position). In the process, the user may be asked to move the comb in opposite directions between iterations. Simply follow the instructions for each iteration until completion.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 51

XRT ULTRAHIGH DFS POSITION CALIBRATION NOTE

This step has been added since the expanded grid voltage file now has provision for separate grid voltage settings for ultrahigh scans. Calibration automatically does necessary Air Calibrations for all selected modes. Very similar to XRT DFS Position Calibration. This calibration will run automatic.

1.

From Image Calibrations Selector, select the XRT Ultrahigh DFS Position and click on “Start Calibration” button.

The next screen appears, all scans will be selected. Click on the start scanning button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 52

2.

Follow the instructions within the prompt, then click Ok.

3.

The system will perform air calibration and generate the required table. The system will then continue to the XRT Ultrahigh DFS Position Calibration. Iterative scans are done for each of the three voltages cases until the focal spot positions are in spec.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 53

This will complete the XRT Ultrahigh DFS Position Calibration. Close the Results screen and return to the Image Calibrations Selector to select the next calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 54

PHANTOM CALIBRATION The Eye Phantom (455012001031) should be on the couch and the phantom should be at its lowest position without causing a collision mode, at around -208mm. 1.

From the Image Calibrations Selector, select the Phantom and click on the “Start Calibration” button. Make sure the couch has been properly zeroed.

2.

All Scans will be selected. Click start scanning button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 55

3.

Follow the instructions within the prompt and select Ok (incremental warm-up begins).

WARNING

05/13/2005

X-RAY AND GAMMA-RAYS ARE PRESENT DURING THIS PROCEDURE.

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 56

4.

If you receive an “Error Override Option” due to improper phantom positioning, follow the information within prompt to correct the position.

Note: Move phantom as directed in the on screen prompt. Refer to figure 13. 5.

Select No at the error dialog. Make the suggested correction, restart the phantom calibration and select recover. You may not need the previous note after this edit.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 57

FIGURE 13 Phantom Holder is Misaligned The calibration will proceed automatically until status completed.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 58

This will complete the Phantom Calibration. Close the Results screen and return to the Image Calibrations Selector to select the next calibration.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 59

AIR CALIBRATION You can select Air Calibrations from the Image Calibrations Selector or from the Main Panel on the left side of the screen. Both sequences are similar in operation. NOTE Standard/High Resolution share the same Air Tables CIRS generates all Air Tables Main Benefit: Speed - Do not need to transfer data files to Host for calculation - Only need to transfer Air Tables to Host (Air Tables are much smaller in size). Run from the Image Calibration Selector, the entire process is automated. Will run all 81 air calibrations scans, take approx. 14 minutes to complete and return a “Calibration Complete” window when finished. 1.

From the Image Calibration Selector, select the Air Calibration and click on the “Start Calibration” Button. Make sure the couch has been properly zeroed.

2.

Follow the instructions within the screen and select Ok at the prompt.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 60

3.

View the images and confirm that there is no object in the image plane. Press OK to continue.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 61

Air Calibration list is displayed to select individual scans, with rotation, slice thickness, resolution and voltage differences.

Select the “All Scans” button and then select Start Scanning.

WARNING

05/13/2005

X-RAY AND GAMMA-RAYS ARE PRESENT DURING THIS PROCEDURE.

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 62

NOTE Auto-Calibration will automatically position the phantom out of the way for air calibration (assuming it has been properly zeroed) Selective Air Calibration does not move the couch or make use of the couch zero; the prompt simply states to “Move Patient Table and all objects out of the scan fields”. 4.

With all scan parameters selected, there will be a total of eighty-one scans to be performed.

This will complete the Air Calibration. Close the Results screen and return to the Image Calibrations Selector to select the next calibration. 05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 63

HCOR (HOUNSFIELD CORRECTION) NOTE Selective Calibration performs scans and automatically adjusts CT number scaling factors. This is the final calibration and is not part of any Auto-Calibration sequence, because the Phantom must be switched. Images from automatic scans should be visually inspected for artifacts or other problems. Infant Phantom 453567047261 1.

The HCOR Calibration is run from the Image Calibrations Selector.

2.

Place the System Phantom on the holder and zero the couch on with the scan laser on the notched ring around the center of the circumference of the body section.

FIGURE 14 System Phantom Align Basic HCOR Make sure no one is in the scan area. 3.

From the Selective Calibration Selector, select the HCOR Calibration and click on the “Start Calibration” Button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 64

4.

From the Selective HCOR Options Selector, select Basic HCOR Calibration. Click on the “Start Calibration” button.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 65

5.

All scans will be selected. Click on “Start Scanning” button to begin.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 66

6.

Follow the information within the user prompt, select Ok. Note: If to far off center, move the phantom up.

7.

Wait for scanning of parameters to be completed.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 67

NOTE

Following Basic HCOR, the relative HCOR cases will also need to be run.

The relative child cases use a different phantom (Infant phantom 453567047261) then the standard system phantom. This will complete the HCOR Calibration, Close screen windows. 05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 68

Auto Calibration Reasons This feature provides an automated set of preset calibration sequences based on various reasons for calibrating the system. This function is a convenient one-button selection to go through all the required calibrations for a selected calibration reason. The recommended calibration reasons are shown in table (refer to page 3), along with the calibration steps that are automatically performed for that sequence. Choosing “Auto Calibration Reasons” from the Selective Calibrations Selector, the following selection menu is displayed.

Once a calibration reason is selected, all specified calibrations for the selected reason are automatically run. NOTE

In addition, custom automatic sequences can be generated by using the “Automatic Mode” button, at the top right corner of the calibration selection GUI.

Select a sequence of calibration steps and press the “Automatic Mode” button to automate the selected sequence.

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 69

05/13/2005

Philips Medical Systems. Confidential and Proprietary information. Refer to Title Page.

1 - 70

ChapterName

LASER ALIGNMENT Interior Scan Frame Lasers There at two internal lasers, at approximately the 11 and 3 o’clock positions, with the X-ray tube at the 12:00 position.

WARNING

HAZARDOUS VOLTAGES INSIDE. DISCONNECT SUPPLY BEFORE SERVICING. FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR DEATH.

1.

Open the front cover to deactivate the drives via the interlock switch. Do not defeat this switch.

2.

Remove the front cone.

3.

Rotate the scan frame clockwise until the tube is at the 12:00 position. Turn the laser on from the gantry panel.

4.

There are two small holes near the ends of the collimator opening. Adjust the lasers until the laser line is seen as one straight line going from one hole to the other. If the lines seem to cross one another, cover one laser to see which one needs adjustment. Adjustments are made to the lasers via their spring loaded adjustment screws.

Cover Lasers There at two lasers on the inside of the front cover. These should be adjusted after the internal lasers. 5.

Close the front cover and secure with the screws at the bottom of the cover. The cone is still removed at this time. Turn on the lasers. Note how the laser line falls in relation to the internal lasers’ line.

6.

This alignment will take more time, since you have to open the cover each time to make an adjustment. Make the adjustment, if necessary to the appropriate laser, close and secure the cover again and re-check the alignment. Repeat until the laser line is correctly in line with the internal lasers’ line. NOTE

You may be able to make the cover laser adjustments with the cover closed. However, when the cone is put back and the cover is closed again, it may affect the alignment of the cover lasers.

7.

Replace the cone and close the front cover. Turn the lasers on again and make a final alignment check.

8.

Need to update the interior to cover laser distance in service tools via configuration menu.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

2 - 70

ChapterName

LOADING A-PLANE CALIBRATION CONSTANTS NOTE 1.

2. 3.

4. 5. 6.

Only required if A-Plane Collimator is being replaced.

On the CD (E:), verify that the serial number of the file matches the serial number of the A-plane collimator installed on the system. Create a new directory on the D:\ drive named APLANE Copy the XXXXXXXXXX.clb file to the D:\APLANE\ directory. Right click the file and edit ”Properties” to un-click ”Read Only”. Click ”Apply” and ”Close”. Save the file and exit NOTEPAD. Start up the DMC Utility Start> Programs > DMC Utility. On the Host PC select the following: ReadJIGFile (Second icon from the left -Shown Below.)

Select the file: D:\APLANE\ XXXXXXX.clb. Select ”SetAC”. To verify the values were stored correctly select ”Clear” and then ”GetAC”. Make sure the 0,1,2,3 were replaced by new values. Select the ”A Offsets” tab and ”SetAOffsets”. To verify the values were stored correctly select ”Clear” and then ”GetAOffsets”. Make sure the default value of 511 was replaced by the new values.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 71

ChapterName

7. 8. 9.

Select the ”A Plane” tab again. Select ”SetAC”. To verify the values were stored correctly select ”Clear” and then ”GetAC”. Make sure the 0,1,2,3 were replaced by new values. Remove the CD from the Host drive and place it in the system data book. Run through the system calibrations as documented in the Brilliance calibration manual P/N 4535 670 61431).

WARNING

DO NOT ENTER VALUES FROM THE CLB FILE MANUALLY INTO THE DMC UTILITY. DOING SO WILL CAUSE THE A-PLANE TO OPERATE INCORRECTLY.

TESTING FOR SKEW 1. 2.

Ensure the Z-RPM Values in the A-plane DMC Utility have been cleared. Use the A-plane utility sequence of Clear/Setzc/Getzc to clear, set, and verify values. THIS WILL PERMANENTLY ERASE THE OLD VALUES. The scans need to be collected at a tube heat of 47% -53% tube heat. Preheat the tube as required.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 72

ChapterName

3.

Enter the appropriate Z-Alignment (Z-RPM) data into the A-Plane Utility GUI screen shown below.

4.

The user must press the ”Set ZC” button to store the values before proceeding. This calibration step shall be repeated until the specified tolerance is achieved at all scan speeds. Select A-Plane Z Mechanical Calibration from the Selective Cal Scan GUI and Start Calibration. Multiple scans can be marked. There is no need to remark scans that have passed. Follow all the prompts until the ”A-Plane Z mechanical Calibration Completed” prompt is displayed. Note: For all versions of software 2.5 and greater, the Z-Mechanical Calibration is automated. This includes MX-8000 EXP, Brilliance, SG-L, SG-164, and Applause.

5.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 73

ChapterName

6.

If the DMS detects an imbalance greater than +/- 5% in the radiation received between ”A” and ”B” slices, a ”Skew Warning” dialogue box will be displayed. No warning is issued if the skew is less than 5%. The warning would appear at the end of the test. The warning will look similar to the image below:

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 74

ChapterName

7.

Use the following chart to determine the amount of shim from the shim kit that is required to correct the skew. (Shim P/N 4535 670 34741)

8.

Record the 6 final Z-Position settings in the system data book.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 75

ChapterName

Windows similar to pictures shown above will/can pop-up during the automated A-plane Z-mechanical alignment test. If you do not get a warning screen on what the skew is, you can use the Green Result windows above to figure the skew out. Just subtract the Right Detectors percentage amount from the Left Detectors percentage amount. For example:

9.

1.80 - (+0.54) = 1.26% Skew Or for a negative value on the right detector: 3.25 - (-1.2) = 4.45% Skew Determine which side will require shimming: Look at the XRT Z Mechanical Alignment Results (shown above). Take the lowest percentage value from the left and right detector and add shim to that side. (Ignore + or - when determining this).

Adding Shim(s) 1.

Once the shim warning is given, the user must determine where to place the self-adhesive shim(s). This can be determined by the positioning the rotor with the collimator at 6 o’clock (position 1800), detector ”1” on the DMS is on the left-most side and detector ”672” is on the right as shown below:

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 76

ChapterName

2.

With the A-Plane collimator removed from the rotor and observing it from the rear, the ”1” side is on the left and the ”672” side is on the right as shown above.

3.

Remove the adhesive liner from the shim and press it to the rear of the collimator-mounting boss on the ”Detector 672” side. Note: If two shims are required, place the 2nd shim on top of the 1st shim. The proper placement is between the two mounting holes as shown above. NOTE

05/13/2005

95% of the systems have shown skew on the ”672” Detector side. If you happen to see an increase of skew after shim(s) installation, remove the collimator and position the shim(s) on the opposite side.

Philips Medical Systems Confidential and Proprietary Information

3 - 77

ChapterName

CALIBRATIONS REQUIRED 1.

This list is the REQUIRED calibrations necessary to run after shimming the A-Plane Collimator. At this point there should be NO skew warnings that appear after the XRT Z-Mechanical Calibration is run. ALL the Calibrations in the Selective Calibration list should be run. Follow the instructions in Document P/N 4535 670 05701 for software that is pre V2.1 (Mx-8000 Dual EXP). Document P/N 4535 670 61431 for the Brilliance System.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 78

ChapterName

APPENDIX A DETECTOR ARRAY SKEW When the X-ray beam Z-orientation is skewed relative to the detector array arc, different segments of the detector would be subjected to X-radiation variation in the Z-direction. In order to calculate the average X-radiation Z-position of the whole detector arc, both ends of the detector array arc radiation data would be utilized.

Detector Array

MX8000 Dual EXP: During each integration period, mu values of the first 16 samples of each slice within each zone are summed and averaged to obtained two values: A1 and B1.

Note: Detector array may have 2 (MX8000 Dual EXP) or 16 (Brilliance 16 Power) logical rows, but are only shown the two opposite end logical rows (row A and row B) for the purpose of Z-tracking illustration.

Brilliance 16 Power: mu values from sample #2 of the two opposite end rows are averaged over stipulated number of views to get values: A1 and B1.

Skew = L - R

MX8000 Dual EXP: During each integration period, mu values of the first 16 samples of each slice within each zone are summed and averaged to obtained two values: A2 and B2. Brilliance 16 Power: mu values from sample #671 of the two opposite end rows are averaged over stipulated number of views to get values: A2 and B2.

FIGURE 1 Detector Array and Radiation Geometry with Skew

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 79

ChapterName

The causes of the X-ray beam skew may be due to A-Plane collimator blade orientation, collimator mechanical mounting, etc. The possible causes can be seen in the following flow chart (Figure 2). The effect of the skew on the Z error ratio is most prominent at the smaller slice thicknesses.

FIGURE 2 Possible Causes Of Skew 05/13/2005

Philips Medical Systems Confidential and Proprietary Information

3 - 80

ChapterName

PATIENT SUPPORT HORIZONTAL CALIBRATION The following procedure will calibration the patient support horizontal position.

WARNING 1. 2. 3.

4. 5.

HAZARDOUS VOLTAGES ARE PRESENT DURING THIS PROCEDURE.

The Gantry power should be on. Log in to Service mode as Philips_Service. Move the couch carbon top to its fully extended position toward the gantry. The encoder is underneath the carbon top. There are two different types of encoder assemblies. 362415 Stegmann encoder (yellow), reset it by removing the cover and depressing the small button inside absolute encoder. See Figure 1. 362416 Baumer encoder, momentarily connect the jumper cable L22520 to P766 as shown Do not leave the jumper on P766. Refer to Figure 2. Replace cover on 362415 absolute encoder if applicable. The Couch zero position is now set. Back up the NVRAM for the Couch. Refer to the Diagnostic GUI manual. See “Upload and Download of NVRAM” on the index page.

Cover on this side

362415 Absolute Encoder

Relative Encoder

FIGURE 1 Absolute and Relative Encoder - 362415 05/13/2005

Philips Medical Systems Confidential and Proprietary Information

4 - 81

ChapterName

L22520

P766

P766

L22520

FIGURE 2 362416 Encoder Reset

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

4 - 82

ChapterName

PATIENT SUPPORT VERTICAL CALIBRATION The following procedure will calibrate the patient support vertical position. This procedure assumes that the floor surface is level and within 1/8” (3mm) allowable tolerance. 1.

The Gantry power should be on. Log in to Service mode as Philips_Service.

2.

Move carbon top all the way out away from the Gantry. Ensure Estop loop is closed.

3.

Open Service Tools from the desktop, select “Calibration Tools” folder and select the “Couch Vertical Calibration” file.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

5 - 83

ChapterName

4.

Select the “Start” button.

5.

Click OK at the warning prompt.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

5 - 84

ChapterName

6.

Make a pencil mark 90mm from the straight edge of the couch that is closest to the Gantry. Raise the couch until the 90mm mark is 1030 mm above the floor. Refer to Figure 1. The side covers will be in the way of your tape measure slightly, so use a straight edge perpendicular to the center line of the couch to get an accurate measurement. (The Gantry Motor Sheave Alignment Tool works well for this.)

7.

Click the appropriate button when the table is at the 1030 mm height. .

8.

Lower the couch until the 90 mm mark on the top edge of the carbon is 560 mm above the floor. Click the appropriate button when the table is at the 560 mm height.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

5 - 85

ChapterName

Panel display should read -469 mm +/- 2 mm. Calibration is complete. Collision tests are automatically re-enabled.

9.

Back up the NVRAM for the Couch. Refer to the Diagnostic GUI manual (453567063761). See “Upload and Download of NVRAM” on the index page.

10. Select the “Ok” buttons to end screens. Straight edge closest to the Gantry

A

1030mm or 560mm Edge of carbon top A" to floor

Floor

FIGURE 1 Vertical Measurements 05/13/2005

Philips Medical Systems Confidential and Proprietary Information

5 - 86

ChapterName

MAIN DRIVES AND ANGULATION SETUP FOR ORIGINAL MDP & TDP SYSTEMS, ALSO SETUP FOR GMP EQUIP SYSTEMS Purpose The purpose of this procedure is to provide instruction for commissioning the scan frame drive motor controller and for the calibration of the gantry angulation and tilt drive systems. Scope This procedure is to be used to power up and verify the proper operation of the motor controller, angular position system and drive positioning of the scanner. The drive commissioning portion of this procedure needs to be performed when a scanner is operated for the first time or when either the motor or motor controller (”SpindleBlok”) is replaced. Safety Precautions Before performing this procedure, ensure that all components affixed to the rotating scan frame are properly secured and that any tools and test equipment have been removed from the vicinity of the scanner. Rotate the scan frame through one entire revolution by hand to verify that no components or fasteners are loose. (MDP & TDP Systems) Equipment Required: Personal Computer, Oscilloscope,8060A true RMS DVM, digital protractor, serial communication cable, RS232 to RS485 converter (SemiPower P/N 85-0151-01 CA-11 Communication cable kit). C:\questor\mx8000Dual\Files\Service\Options\Motor\SemiPow folder on your PC. NOTE

Before angulation calibration can proceed the DMC, GHOST, MDP and CONTROL LINK must be functional and loaded to the latest firmware revisions.

(GMP Equip Systems) Equipment Required: Personal Computer, Oscilloscope, Fluke 8060A true RMS DMM (or equivalent), digital protractor, serial communication cable, and C:\questor\mx8000Dual\Files\Service\Options\Motor\SemiPow folder on your PC. NOTE

05/13/2005

Before angulation calibration can proceed the DMC, GHOST, GMP, and CONTROL LINK must be functional and loaded to the latest firmware revisions.

Philips Medical Systems Confidential and Proprietary Information

6 - 87

ChapterName

Angulation Procedure 1.

Switch the gantry to service mode. Disable power to the main drives by opening the fuse block (F357, F358, and F359). Turnon power to the gantry.

2.

On the R2D board connect channel 1 of an oscilloscope to P4 pin 1. Connect the ground to P4 pin 10. Verify an 8kHz. sine wave is present. Set the scope to trigger on this channel.

3.

Connect channel 2 of the scope to P4 pin 3 (SINE). Slowly rotate the rotor clockwise until the trace on channel 2 is at its’ lowest value (null position).

4.

Connect the DMM to P4, pin 4 (COSINE) and P4, pin 10 (Ground). Adjust the gain pot (R127) on the MDP/GMP board to obtain 1.9 VAC (±10mV).

5.

Record COSINE voltage.

6.

Connect channel 2 of the scope to P4 pin 4. Slowly rotate the rotor clockwise until the trace on channel 2 is at it’s lowest value (null position).

7.

Connect the DMM to P4, pin 3 (SIN) and P4, pin 10 (Ground). Verify that the voltage is within ±20mV of the voltage documented for COSINE.

8.

Record SINE voltage.

9.

Rotate the rotor clockwise until the tube is at the 12 o’clock position. Using a torpedo level, verify that the tube shelf is level.

10. Attach channel 1 of the scope to P7 pin 9 (ADREF) of the R2D board. Sync on this signal. Attach the second channel to P4 pin 3 (SIN). 11. Slowly rotate the rotor from the level position until SIN is at a null. The SIN should increase in amplitude in phase with ADREF when the rotor is moved clockwise. If the amplitude increases out of phase with ADREF rotate the rotor until the desired phase relationship exists. 12. With the SIN at the desired orientation with ADREF and at a null move channel 2 to P7 pin 4 (COSINE). The signal should be at a peak and in phase with ADREF. As the rotor is rotated clockwise the signal should decrease in amplitude in phase with ADREF. 13. Connect channel one of a scope to P7, pin 6 (NORTHMARK). Sync on this pulse. Slowly rock the rotor around the level position. Find the NORTHMARK pulse that is closest to the level point of the tube shelf. 14. When you have found the closest NORTHMARK, set the brake on the drive motor. 15. Adjust the flag on the stator to be in the middle of the zero interrupter board mounted on the rotor. Make sure that the flag doesn’t hit the zero interrupter at any point. Make sure there will be clearance when the rotor moves at high speeds.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

6 - 88

ChapterName

16. Connect channel 1 of the scope probe to P17, pin 5 on the GHost board. Sync on this signal. Verify an INDEX pulse is present only as the zero gate passes the flag on the stator. 17. Connect channel 1 of the scope to P17, pin 3 (AP0). Connect channel 2 of the scope to P17, pin4 (AP90). Sync on channel 1. 18. Rotate the rotor clockwise while observing the waveforms. AP90 should lead AP0 by 90 degrees as the rotor is rotated clockwise

Procedure Main Drive Commissioning

CAUTION

BEFORE PROCEEDING, THE ROTATING SCAN FRAME MUST BE PINNED IN ONE OF THE TWO LOCKING LOCATIONS BEFORE THE MAIN DRIVE BELT IS REMOVED. THE MAIN DRIVE BELT MUST BE REMOVED FROM THE MOTOR UNTIL THE CORRECT DIRECTION OF ROTATION (CLOCKWISE) CAN BE VERIFIED. IF THE SCAN FRAME IS ROTATED IN THE WRONG DIRECTION (COUNTERCLOCKWISE) DAMAGE TO THE SLIP RING BRUSHES WILL OCCUR.

1.

Turn the gantry power off at the wall box. Verify that the Main Drives paddle switch located on the AC Control chassis is in the ”1” (ON) position and the key switch is in service mode.

2.

On the GHOST PCB, remove the cable to J28 and short the two pins together at the end of the cable. Remove the jumper located at P26 (Accessories).

3.

Put a jumper from Pin 1 of P26 (Accessories) to Pin 1 of P23 (Patient Support Override) to complete the ESTOP loop.

4A. (MDP & TDP Systems) Close the Main Drive fuse block (F357, F358 & F359). Connect the cable and adapter from the MDP PCB P11 to the PC serial port as shown in figure 1. 4B. (GMP Equip Systems) Close the Main Drive fuse block (F357, F358 & F359). Connect the cable from the GMP board P36 to the PC serial port as shown in figure 1.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

6 - 89

ChapterName

FIGURE 1 Connection from PC to Spindleblok 5.

Power up the gantry at the wall box.

6.

Make sure the cover interlock switch is pulled out and push the yellow ”START” button. You should hear a clunking sound indicating that the main drives contactor (MDK) is energized and the green power LED on the SpindleBlok should now be on.

7.

With the DMM set to the 750 VAC scale, carefully check the voltage between all combinations of L1,L2, and L3 at the front of the SpindleBlok. Each measurement should be approximately 230 VAC. Each leg should also measure approximately 132 VAC to ground. If any voltage isn’t correct, do not proceed until every combination measures the proper voltage.

8.

Before the motor controller can be initialized or ”commissioned”, it is first necessary to install the SpindleBlok control and communication software on a local PC. (NOTE: If this step has already been completed, go to the next step. If not, install the software per the following procedure and connect the PC to the SpindleBlok as shown in figure below.) The software ”SSI_POD2P” can be found at: C:\questor\mx8000Dual\Files\Service\Options\Motor\SemiPower folder on your PC.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

6 - 90

ChapterName

Connect the PC to SpindleBlok

9.

For ease of use, create two separate Windows desktop shortcuts on the local PC for executable files SbConfig.exe and SSI_POD2P.exe contained in the SB040a subdirectory.

10. Run the SSI_POD2P.exe from the desktop. This will launch the SSI IDM Emulator that will then be used to commission the motor drive. Verify that there is a ”Set All” button present on the main SSI display. If there is no ”Set All” button present, press ^D, close the program and then reopen it a second time. The ”Set All” button should now be present. It is also necessary to verify which Comm port you will be using on the local PC to communicate with the controller. From the pull-down menu select: Utils > Comm Setup > 9600 Baud and verify that Comm Port 1 is selected (assuming that is the port you are using). Click on ”OK” to close the window and continue. 11. From the pull-down menu selections on the main SSI display, select: Utils à IDM Version à 040A. Next, from the pull-down menu select: File à Open User List à SGL_SB_040A_04302002.def and then open the file. This will now display a table of all the motor drive parameters, their abbreviation codes and the current parameter values. 12. From the main SSI display click the ”Set All” button and answer YES to Download All Parameters? The following results should be displayed: Write Attempts 79 Successful Writes 79 Write to Read-Only Errors 0 Other Errors 0 05/13/2005

Philips Medical Systems Confidential and Proprietary Information

6 - 91

ChapterName

13. Close the SSI IDM Emulator window and launch the SbConfig.exe from the desktop. This will launch the SpindleBlok Configuration Tool program. From the pull down menu selections, select: Util à Comm Setup and verify that the 9600 baud rate and the same comm port are selected as in the SSI IDM Emulator configuration. 14. From the pull down menu selections in the Configuration Tool bar, select: Utils à IDM Version à 040A. From the main display, click the ”I/O Init” button. Next, from the pull down menu select: File à All Parameters and then click the ”Get All” button. If successful, an ”Upload Completed” will be displayed in the Last Message dialogue box. From the pull down menu selections in the Configuration Tool bar, select: Drive Mode, and verify that the radio button for ”Extended Commission ¤ Disabled” is selected. Click on ”OK” to close the window and continue. A ”Mode Set Successfully” will be displayed in the Last Message dialogue box. 15. Again from the Configuration Tool window, select: Utils à Motor Setup. At this point, a Motor Setup subwindow should be displayed with the following data: Horsepower 2.00 Voltage 230 Rated Current 8.00 Rated Speed 1744 Rated Frequency 60 16. If this data is correct, press the ”Commission Drive” button on the Motor Setup subwindow. There will be a brief pause and then the amber ”Communication” status LED on the SpindleBlok will light as the drive parameters are downloaded. An information box should pop up with the message ”Commissioning Drive”. If the download is successful, the green ”On Line” status LED will come back on after a few moments and a ”Mode Set Successfully” will be displayed in the Last Message dialogue box. Press the ”Close” button to exit this window. 17. From the pulldown menu selection in the Configuration Tool window, select: Drive Mode and enable the ”Extended Commission Enabled” radio button. Also verify that the ”Forward Direction Enable” and ”Reverse Direction Disable” radio buttons are selected. Press the ”OK” button to close this window. Next, from the Configuration Tool window, select: Utils! Motor Setup. Once again the Motor Setup subwindow will be displayed. Press the ”Commission Drive” button on the Motor Setup subwindow. Standing at the rear of the gantry and looking at the motor shaft, the proper rotation of the drive sheave should be counterclockwise to ensure clockwise rotation of the gantry. This process takes approximately 1 minute and during this time the Info box should display ”Commissioning Drive”. When finished, close the motor setup subwindow. 18. To complete the verification of the drive system, disable drives by placing the Main Drive paddle switch in the OFF ”O” position. Replace the main drive belt ensuring that the belt is aligned to the outer-most groove of the rotor casting (toward the rear of the gantry); the belt must also be in the same outer-most groove of the motor drive sheave. Verify that the DMS cover has been reinstalled. With the locking pin removed, rotate the rotor clockwise by hand 4 or 5 times to seat the belt and ensure it is 05/13/2005

Philips Medical Systems Confidential and Proprietary Information

6 - 92

ChapterName

centered on the belt tensioner wheel. Also verify that all cables and components are secure, the rotor is in balance and that nothing is in contact with the stator. 19. Re-enable drives by placing the Main Drive paddle switch in the ON ”|” position. Press ”IO Init”. If successful, an ”IO Init Successful” will be displayed in the Last Message dialogue box. From the SpindleBlok Configuration tool window, command the drive to run at a 15 RPM speed by entering the value 225 on the CO2 command line (omega_cmd_save) and then press ”SET”. If successful, the text ”Write Successful” will be displayed in the Last Message dialogue box. The CO2 drive parameter is equal to the RPM of the motor shaft (see Appendix). Press the ”START” button and run the gantry at 15 RPM for 3 to 4 minutes while listening for any unusual noises or observing any vibrations. APPENDIX Different drive speeds are obtained by modifying the CO2 command line (omega_cmd_save) parameter in the SSI IDM Emulator window. The CO2 drive parameter is equal to the RPM of the motor shaft. Since one revolution of the scan frame is obtained by 15 revolutions of the motor shaft, multiply the desired scan frame RPM by 15 or use the following table to find the correct parameter to enter (NOTE: The values in this table are not valid for use in CAN SENDER!): DESIRED SCAN FRAME R.P.M.

TIME PER 1 REVOLUTION

CO2 (omega_cmd_save) PARAMETER

15

4.0 sec.

225

30

2.0 sec.

450

60

1.0 sec.

900

80

0.75 sec.

1200

0.5 sec.

1800

120

***NOTE: DO NOT EXCEED 120RPM FRAME SPEED AT ANY TIME!!!*** 20. The Main Drive commissioning is completed. 21. While the gantry is rotating observe the Rotate Counter. Count the revolutions between counter increments. This will verify that the revolution counter is correctly counting once every 10 revolutions. 23. Halt the gantry by pressing ”STOP”. 24. Close out of the SbConfig.exe application.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

6 - 93

ChapterName

(MDP & TDP SYSTEMS) TILT ACTUATOR LIFT SWITCH SETTINGS (NO TILT IN CVCT) 1.

Verify that each of the two tilt actuators lift switch brackets have been assembled with the 120VAC power switch on the inner switch and the logic switch on the outer side of the bracket. To enable the tilt ”JOG” buttons on the Dual Tilt Interface PCB, the TILT_CALIB_BKST message must have been sent.

2.

All pots on the Power UPS™ DC motor controller have been pre-set at the factory and sealed; no adjustment to the motor controller should be made.

3.

On the motor controller verify that the two jumpers selecting the AC input voltage 115V/230V SELECT are set to the ”115” position, that the INPUT INTERFACE jumper is set to the ”DIGITAL” position, that the ANALOG INPUT VOLTAGE is set to the ”5V” position. The FAILSAFE jumper is no longer installed and is now replaced by a permanently installed diode, which will indicate the jumpers are set correctly.

4.

With the gantry at 0o and starting with the right-hand column, disconnect one of the two power leads (TB1-1 or TB1-2 by the label on the wire) from the tilt actuator to the DC motor controller *CAUTION THIS LEAD WILL BE 70VAC*. Using the forward ”JOG” button, tilt the gantry forward until the actuator dowel is in the fully up position on the limit switches and the opposite tilt actuator begins to stall. Use the following table along with shim stock or feeler gauges to adjust the switch height settings. Repeat this step for the left-hand column limit switches:

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

7 - 94

ChapterName

(GMP EQUIP SYSTEMS) TILT ACTUATOR LIFT SWITCH SETTINGS (NO TILT IN CVCT) 1.

Verify that each of the two tilt actuators lift switch brackets have been assembled with the 120VAC power switch on the inner switch and the logic switch on the outer side of the bracket. To enable the tilt ”JOG” buttons on the GMP board, the TILT_CALIB_BKST message must be sent.

2.

With the gantry at 0°, remove jumper plug assembly 453567023071 from the Gantry Motion Power (GM Power) board. Using the forward ”JOG” button, tilt the gantry forward until the actuator dowel is in the fully up position on the limit switches and the opposite tilt actuator begins to stall. Using the table below along with shim stock or feeler gauges, adjust the switch height settings to get the “no trip” and “trip” as indicated. Replace plug assembly 453567023071.

3.

With the gantry at 0°, remove jumper plug assembly 453567023081 from the GM Power board and repeat the process from step 2, above, for the other column’s lift switches.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

7 - 95

ChapterName

CAUTION

FRAME WILL ROTATE WHEN E-STOP IS CLOSED. MAKE SURE THAT IT CAN’T HIT ANYTHING.

Power Cutout Limit (inner switch)

Logic Limit (outer switch)

no trip @ .040”

no trip @ .060”

trip @ .060”

trip @ .070”

LIFT SWITCH AND TILT CIRCUIT VERIFICATION 1.

Tilt the Gantry back and forth several times from zero degrees to -30 starting and stopping the gantry at least 10 times as you tilt from zero toward -30. The E-Stop loop should not open at anytime.

2.

The Gantry should tilt smoothly without excessive vibration or jerking in both directions, indicating that the E-Stop loop doesn’t open.

TILT LIMIT SWITCH SETTINGS 1.

Enable the tilt ”JOG” buttons on the Dual Tilt Interface PCB by using the CanSender utility to send a TILT_CALIB_BKST message.

2.

Using a shim stock set or feeler gauges, check and set the tilt limit switches on the right-hand gantry column per the following table: Table 3

05/13/2005

Gantry Angle Setting

Software Limit (with roller actuator)

Logic Limit (center switch)

Power Cutout (outboard switch)

±31.5 o

N/A

no trip @ .020”

no trip @ .040”

±31.5 o

N/A

trip @ .030”

trip @ .060”

±30.5 o

trip @ .010”

N/A

N/A

Philips Medical Systems Confidential and Proprietary Information

7 - 96

ChapterName

Testing E-Stops NOTE

The Scanner application must be brought up at least one time in order to get a tilt drive is ok signal at the Ghost. Until you do this you will not be able to close the E-Stop loop using the CAN Sender command GANTRY_CONFIG_END_BKST.

1.

Test all the E-Stop buttons by pressing each one and verifying that the Main Drive contactor drops out. After you push in each button you must rotate it clockwise to pop the button back out. Then push the yellow start button to engage the MDK and move on to the next E-Stop button, repeat this process until you have verified the operation of all 6 buttons.

2.

Remove all test jumpers and reconnect all cables to the correct locations.

3.

Turn the Gantry key switch to Normal mode, make sure 6 E-Stop buttons are out, and the lift switches are in the closed position.

4.

Close the Slip Rings fuse block (F351, F352, F353) * CAUTION 480vac 3phase Now on the Slip Ring and Rotate Frame*.

5.

All the CPMs must be booted up and running correctly.

6.

On the console Start the Scanner application.

7.

If everything is working so far, you should get a dialog box on screen with the text ”Please, move the switch to the ”ON” position momentarily to start the Gantry!”. If this box doesn’t appear, there is a problem preventing the E-Stop from closing.

8.

Once you see the text box described in step 8, run CAN Send from the Servicetools GUI. Select the box labeled TILT from the left side. Then send the message TILT_CALIB_BKST. The system should now ignore the state of the tilt circuit and allow you to attempt to close the E-Stop loop.

CAUTION

9.

FRAME WILL ROTATE WHEN E-STOP IS CLOSED, MAKE SURE THAT IT CAN’T HIT ANYTHING.

Close the E-Stop loop by turning the key switch on the CT box clockwise. Rotate frame should now move to the home position (XRT at 6:00). LEDs 21 and 22 on the Ghost should go off and stay off indicating that the E-Stop loop is closed.

10. Check the operation of the Heat Exchanger fans make sure they are turning under power and that the air flow is toward the back of the gantry indicating the fans are operating correctly.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

7 - 97

ChapterName

CT Box and Gantry Controls/Couch Verification 1.

Verify all the controls on the CT Box work as designed. These include Couch horizontal in/out, Couch vertical up/down, Gantry tilt forward/back.

2.

Verify all the buttons on the left and right Gantry Panel controls work as designed. These include Gantry tilt forward/back, Couch horizontal in/out, Couch vertical up/down, Inside to Outside laser markers, Patient unload, Zero horizontal position, and Laser on/off.

3.

Test the operation of both handles tape switches and both sides of the foot switch. make sure that all 4 the tape switches work properly.

05/13/2005

Philips Medical Systems Confidential and Proprietary Information

7 - 98