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GE Healthcare eXplore Locus SP Service Manual

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Technical
Publication
Direction 5158821-100
Revision 3
GE Healthcare
eXplore Locus SP Service Guide
Copyright 2005 by GE Healthcare
All rights reserved
http://www.gehealthcare.com
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Summary of Contents for GE Healthcare eXplore Locus SP

  • Page 1 Technical Publication Direction 5158821-100 Revision 3 GE Healthcare eXplore Locus SP Service Guide Copyright 2005 by GE Healthcare All rights reserved http://www.gehealthcare.com...
  • Page 2 This page is intentionally left blank...
  • Page 3 Remove lexan collimator window if present. Live animal handling prohibition. Before This Guide documents how to service GE’s eXplore Locus SP scanner. It is only intended for use by GE qualified personnel who have received training on its Begin operation. The eXplore Locus SP may be not be used or serviced in a manner outside manufacturer specifications.
  • Page 4 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE This page is intentionally left blank Page 4...
  • Page 5 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Contents Introduction Important Precautions ................. 11 1.1.1 Language ............11 Safety &...
  • Page 6 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 2.3.4 Removing Unnecessary Scan Data ........28 Troubleshooting Overview ....................
  • Page 7 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Software Set Up / Back Up Computer Hard Drive ................43 5.1.1 Ghost an Image on C Drive & Update Software ......43 Back Up &...
  • Page 8 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Calibration Overview ....................97 7.1.1 Purpose ............97 7.1.2...
  • Page 9 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Preventive Maintenance Preventive Maintenance (PM) Introduction ........229 8.1.1 Why Do Preventive Maintenance? ........229 8.1.2...
  • Page 10 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 99 Appendix 99.1 Calibration Worksheets ..............245 99.1.1 Detector Replacement Calibration Worksheets ......246 99.1.2 Stage Replacement Calibration Worksheets .
  • Page 11 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Chapter 1 Introduction Purpose: This chapter informs the reader about important precautions and safety considerations. It also provides publication conventions so that the reader can identify safety and general material that is considered important by its format.
  • Page 12 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Page 12...
  • Page 13 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Page 13...
  • Page 14 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Section 1.2 Safety & Hazard Information 1.2.1 Text and Character Representation Different paragraph and character styles are used to indicated potential hazards. Paragraph prefixes, such as hazard, caution, danger and warning, are used to identify important safety information.
  • Page 15 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 1.2.2 Standard Hazard Icons Several different graphical icons (symbols) are used to make you aware of specific types of hazards that could possibly cause harm. ELECTRICAL MECHANICAL...
  • Page 16 GE will use its own specially trained field engineers. All of GE’s electrical work on these products will comply with the requirements of the applicable electrical codes. The purchaser of GE equipment shall only utilize qualified personnel (i.e., GE’s field engineers, personnel of third-party service companies with equivalent training, or...
  • Page 17 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Avenue, Room 1016, Bethesda, Maryland 20814, and of the International Commission on Radiation Protection, and take adequate steps to protect against injury. The equipment is sold with the understanding that the General Electric Company, Medical Systems Group, its agents, and representatives have no responsibility for injury or damage which may result from improper use of the equipment.
  • Page 18 Dispose of the wastes from the installation properly. • Push any one of the Emergency Stop button during an emergency. • Report any existing or potential safety issues to GE Healthcare. • Handling of live animals during servicing is prohibited. 1.3.3 Omissions, Errors &...
  • Page 19 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Chapter 2 Theory & Components Section 2.1 Basic Concepts This section describes the basic components of the x-ray assembly, and explains how they work together to produce a projection. It describes some concepts that will help you to understand the choices that are available to you when you set up and perform a scan.
  • Page 20 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 2.1.2 Definitions of Basic Concepts The following sections describe some basic concepts related to creating a projection of a specimen using x-rays. ATTENUATION The attenuation coefficient can be understood as the x-ray stopping power of an object.
  • Page 21 It is important to understand that both the projection that is created with the GE eXplore Locus SP scanner and the reconstructed volume that is created using the eXplore Reconstruction Interface are representations of the structure that the x-ray beam passed through;...
  • Page 22 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE ADUs, CT NUMBER AND HOUNSFIELD UNITS When the first projections are created, the values of the pixels are given in ADUs. ADU stands for Arbitrary Digital Units, and it is a scale that is particular to the eXplore Micro CT system. The same...
  • Page 23 Hardware & Software Components 2.2.1 Hardware There are several components to the GE eXplore Locus SP. The following pages will describe the location and function of each. EXTERNAL FEATURES The main components of the eXplore Locus SP are the cabinet, the console, and the control boxes.
  • Page 24 CCD camera, which records the image. 2.2.2 Software The following describes the software components of the GE eXplore Locus SP that are needed to control the scanner, acquire projections, and reconstruct a volume. EXPLORE WARM-UP APPLICATION...
  • Page 25 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE EXPLORE SCAN CONTROL Use eXplore Scan Control to specify the scan protocol (which determines the hardware and software settings of the scan), control the scanning process, and start a scan.
  • Page 26 MICROVIEW MicroView is the free, open source viewing application available from GE Healthcare. MicroView can display files of single projections that were created during the acquisition phase, and it can also view the three- dimensional volume or the transverse slices that were created during the reconstruction phase.
  • Page 27 Evolver is located in: C:\Program Files\GE Medical Systems\eXplore Utilities\Evolver.exe The eXplore Reconstruction Utility is located in: C:\Program Files\GE Medical Systems\eXplore Utilities ReconInterface.exe MicroView is located in: C:\Program Files\GE Healthcare\Imaging Applications\Microview.exe 2.3.2 Files Created During the Acquisition Process PROJECTION FILES What: Projection files are the files created during the acquisition process.
  • Page 28 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 2.3.3 Files Created During the Reconstruction Process CORRECTED FILES What: When the projection files are corrected, another set of VFF files is created. There is one corrected VFF file for each original projection file.
  • Page 29 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Chapter 3 Troubleshooting Section 3.1 Overview 3.1.1 Avoiding Common Errors Wrong filter: When a low density filter is used in combination with a high density specimen, beam hardening can occur.
  • Page 30 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Tube not warmed up: When the x-ray tube is not warmed up, it emits an x-ray beam that is uneven. The projection that is created looks similar to the projections that result when the voltage and current are low.
  • Page 31 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 3.2.2 System Wide Failure System Wide Failure Problem Possible Cause Suggested Recovery/Solution Applications will not start Ensure Microsoft.NET version 1.1 is installed (VB.NET app will not run without it).
  • Page 32 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Cluster Problem Possible Cause Suggested Recovery/Solution Check that MAC address is listed in /etc/dhcpd.conf (edit with Webmin Tool). Ensure the gigabit network switch is powered and is showing link lights for each machine.
  • Page 33 Check network broadcast is set correctly in regs on console: • HKLM\Software\GEMS\ ReconServer\BroadcastAddr0 ReconInterface starts, hangs, then Check authorization: fails • C:\Program Files\GE Medial Systems\eXplore Utilities\Logs\REconServer.log on win32 • /var/log/reconsvr.log on cluster (via Web Tool) • Unauthorized: request license.reg/ license.dat file.
  • Page 34 • check http://192.168.12.1 -> queue manager ReconInterface fails in some other Check log files: • C:\Program Files\GE Medical Systems\eXplore Utilities\Logs\ ReconServer.log with win32 • /var/log/reconsvr.log on cluster (via Web Tool) ReconInterface daemon non- Stop ReconInterface.
  • Page 35 Ensure tabs exist in protocol, not spaces. Protocol files are missing in drop-down menu: • Check protocols directory exists and has *.protocol files: C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols Scan Manager problem Check for sufficient data storage on D:\ or R:\ drive. Page 35...
  • Page 36 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 3.2.6 Fluoroscopy Fluoroscopy Problem Possible Cause Suggested Recovery/Solution No Fluoro Are Fluoro Window/Level slide bars correctly set? If not, adjust slide bars or check filter. Are X-Rays on? If not, turn on X-Ray Source.
  • Page 37 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Page 37...
  • Page 38 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE This page is intentionally left blank Page 38...
  • Page 39 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Chapter 4 Functional Checks Section 4.1 Overview 4.1.1 Purpose This Chapter describes how to test the functionality of certain equipment on the eXplore Locus SP. After troubleshooting a problem, a functional check may be required to determine whether a piece of equipment is faulty.
  • Page 40 (approximately 14 minutes), right-click on the icon again and select Exit. The System Warm-Up application can be re-initialized by double-clicking on WarmupApp.exe in C:\Program Files\GE Medical Systems\eXplore Utilities\ Access the X-Ray and Motor Controller software. Ensure the fields below are set to the following settings:...
  • Page 41 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE select OK when the text concerning placement of the specimen appears. 11. Press w to bring up the Window and Level controls in Fluoro. 12. Adjust Window and Level in Fluoro to obtain the centring bebe projection.
  • Page 42 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 4.2.7 X-Ray Indicator Light, Small Visually inspect the X-Ray Indicator Light. Verify that X-Ray Source is working. 4.2.8 Comair Blower A Comair Blower is used to cool the X-ray tube. When the main cabinet is powered, the center part of the Blower spins.
  • Page 43 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Chapter 5 Software Set Up / Back Up Section 5.1 Computer Hard Drive 5.1.1 Ghost an Image on C Drive & Update Software Enter the computer BIOS by pressing F2 at initial computer boot up.
  • Page 44 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE a. Click on Start -> Microsoft Update Alternatively, if Microsoft Update is not on the Start menu, go to www.microsoft.com, click on 'Security & Updates'. Then click on Microsoft Updates.
  • Page 45 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE b. Click on Express. c. Follow instructions from the website (install updates if needed, restart if prompted, etc.). Update Norton AntiVirus software: a. Start -> Programs -> Norton AntiVirus -> Live Update...
  • Page 46 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE b. Click on Next. c. Click on Next, to install. d. When complete, restart the computer if needed. Section 5.2 Back Up & Restore 5.2.1 Back Up Calibration and Registry Settings SAVE CALIBRATION SETTINGS Capture a screen shot of the Calib.
  • Page 47 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Save the document to both C: and D: drives. Copy D:\calib folder to C: drive. Copy C:\translations1 to D: drive. BACK UP REGISTRY If needed, add the following folder to the C: drive: Registry Backup Create a sub-folder under Registry Backup and label the folder with "today’s date"...
  • Page 48 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 10. Once the Microsoft Registry Editor opens, click on the GEHC folder. 11. Click on File, then choose Export... from the drop-down list. 12. Under Save in, find the Registry Backup folder, then select the sub-folder labelled with today’s date.
  • Page 49 19. Disable the test protocols by changing the 1x1wire.protocol, 2x2wire.protocol and 4x4wire.protocol files to: 1x1wire.txt 2x2wire.txt 4x4wire.txt Files are located in C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols\ BACK UP CRITICAL FILES TO DVDs Copy the following files to a DVD: C:\translations1 Page 49...
  • Page 50 ERVICE UIDE all the transform and transform.dat files found in D: drive the D:\calib folder and the D:\detector folder the C:\Program Files\GE Medical Systems folder the newly created calibration_values.jpg file all saved volumes (e.g. 1x1_wire_cs_360) the C:\Registry Backup folder. Label the DVD with the name Calibration Values, and include the system serial number and date.
  • Page 51 Copy the following files from the DVD, overwriting the existing files: translations1 to the C: drive calib folder and detector folder to the D: drive GE Medical Systems\eXplore Utilities\Protocols folder to C:\Program Files\GE Medical Systems\Protocols folder GE Medical Systems\eXplore Utilities\Parameters folder to C:\Program Files\GE Medical Systems\Parameters folder Once the files are restored, ensure the restored files are not "read-only":...
  • Page 52 COPY THE PARAMETERS DIRECTORY FROM DELL TO HP Copy the directory “C:\Program Files\GE Medical Systems\eXplore Utilities\Parameters” from the Dell to the “C:\Program Files\GE Medical Systems\eXplore Utilities\” directory on the HP. IMPORT THE FOLLOWING KEYS INTO THE HP REGISTRY 10. Double-click the file recon.reg on the HP’s Desktop 11.
  • Page 53 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Chapter 6 Field Replaceable Units Section 6.1 Overview Detailed instructions for removing and replacing eXplore Locus SP components and assemblies appear in this chapter. 6.1.1 Lockout / Tagout (LOTO) Instructions...
  • Page 54 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE b. Verify the safety of the area. c. Ensure the safety devices and guards are in place. d. Return system functions. e. Remove your lock and tag.
  • Page 55 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.1.2 Left Access Panel Removal The left access panel needs to be removed for many of the procedures shown in this section. Instructions follow. TOOL LIST Standard toolkit...
  • Page 56 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Disconnect ground cable to panel. Remove panel. REPLACE Reverse of removal. FOLLOW-ON PROCEDURES Panel ground None Page 56...
  • Page 57 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.1.3 Right Access Panel Removal / Replacement INTRODUCTION The right access panel needs to be removed for many of the procedures in this section. Instructions follow. TOOL LIST...
  • Page 58 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.1.4 Case Removal / Replacement INTRODUCTION Removing the case is necessary to access and service some internal components. TOOL LIST Standard toolkit SUPPLIES None SAFETY CONSIDERATIONS •...
  • Page 59 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Using 5/32” hex key, remove four screws, lockwashers and hold-down brackets securing case to base. Access to the hold-down bracket behind the electrical flange is restricted. Loosen the four 5/32"...
  • Page 60 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.1.5 X-Ray Shield Removal / Replacement INTRODUCTION Shields must be removed to access the detector, Rear shield source and stage. Typically, back shield is removed first. Right shield...
  • Page 61 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Using 9/64” hex key remove two screws securing left-hand shield to source stand. 9/64" Remove cable to bottom of shutter control as required to remove shield. Using 9/64” hex key, remove two screws from front and back of right shield.
  • Page 62 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Section 6.2 Remove / Replace FRUs 6.2.1 Comair Blower and Hose Removal / Replacement The blower is located behind the left panel assembly. TOOL LIST Standard toolkit...
  • Page 63 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE REPLACE Reverse of removal. Torque screws securing blower to bottom of case. Ventilator hose FOLLOW-ON PROCEDURES • Observe the blower operating with the power on. • Replace left access panel.
  • Page 64 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.2 Right Comair Fan Removal / Replacement INTRODUCTION The unit is equipped with two fans, located on the rear panel, and provide fresh/cooling air to unit. A slightly different procedure is required for each fan.
  • Page 65 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Remove lead shield from fan. REPLACE Reverse of removal. Install fan so that air flow is out of unit. Fan power cables are not polarized. Use small adjustable wrench as required to hold standoffs while tightening fan.
  • Page 66 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.3 Left Comair Fan Removal / Replacement INTRODUCTION The left fan is located on the rear panel, and blows air out of the unit. TOOL LIST Standard toolkit...
  • Page 67 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.4 Interlock Removal / Replacement INTRODUCTION The unit has three interlocks: on right and left panel and on the sliding door. The left and right interlocks are identical, and this procedure applies to both. See Section 6.2.19 for details on the door interlock procedure.
  • Page 68 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 1. Using Phillips screwdriver open access cover. Note wire location 2. Using Phillips screwdriver, loosen and remove two wires from interlock body. Wire polarity is not important, but terminal location is.
  • Page 69 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.5 X-Ray Indicator Light Removal / Replacement INTRODUCTION The light illuminates when x-rays are being generated. TOOL LIST Standard toolkit SUPPLIES None SAFETY CONSIDERATIONS X-ray shielding contains lead and lead compounds, chemicals known (to the State of California) to cause cancer and other reproductive harm.
  • Page 70 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.6 Temperature Controller Removal / Replacement INTRODUCTION The temperature controller is the metal blue box, usually located in storage area. TOOL LIST None SUPPLIES None SAFETY CONSIDERATIONS PRECONDITIONS Machine locked out.
  • Page 71 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.6.1 Set-Up Temperature Controller Plug in and run the Temperature Controller. Press the Green button on the left of the control panel to scroll to the first setting. Pcnt should appear in green at the bottom of the display screen.
  • Page 72 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.7 Specimen Stage, Short Limit Switch Removal / Replacement INTRODUCTION Two limit switches limit vertical travel of the specimen stage and prevent it from colliding with Upper limit switch the bracket.
  • Page 73 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE LIMIT SWITCH REMOVAL Unplug wire connectors to limit switches. Using 3/32” hex key, loosen two screws, and slide limit switch bracket up and out of the t-slot in the specimen slide.
  • Page 74 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.8 Magnification Stage Limit Switches Removal / Replacement INTRODUCTION The magnification stage is equipped with two limit switches, located along the outside of the limit switch bracket.
  • Page 75 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.9 Filter Wheel Assembly Removal / Replacement INTRODUCTION The filter wheel assembly is secured to the front of the x-ray source by a cover. Filter wheel TOOL LIST...
  • Page 76 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.10 Module Servicing INTRODUCTION The system is equipped with three control modules. These are mounted to the table and secured with four Phillips screws and countersunk washers.
  • Page 77 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.11 Rotary Stage Removal / Replacement INTRODUCTION The rotary stage is secured to the gear box slide spacer with four screws and two dowels. It pivots on the dowels for calibration and is secured by the screws.
  • Page 78 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Using 5/32" hex ball driver remove lower right screw (looking from the front) and remove rotary stage from gear box slide spacer. Support weight of stage as the last screw is removed.
  • Page 79 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.12 Specimen Slide Removal / Replacement INTRODUCTION The specimen slide controls the vertical position of the specimen relative to the x-ray source. There are 2 methods of removing the specimen slide: A.) Remove rotary stage first, then only remove the...
  • Page 80 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE A) REMOVE ROTARY STAGE FIRST, THEN SPECIMEN SLIDE Disconnect cables (4) to specimen slide. Using 4mm hex key, remove four screws securing gear box slide spacer to specimen slide.
  • Page 81 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE B) REMOVE ENTIRE ASSEMBLY, THEN SEPARATE Disconnect cables (4) to specimen slide. Using 4mm hex key, remove the stage retaining screws. Remove entire rotary stage and specimen slide assembly.
  • Page 82 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE REPLACE Reverse of removal. Attach limit switch bracket to specimen slide. Attach limit finger to specimen slide. Attach specimen slide to angle plate. Attach gear box slide spacer to specimen.
  • Page 83 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.13 X-Ray Source Removal / Replacement INTRODUCTION The x-ray source is located under a shielded aluminum box at the left-side of the unit. It is attached to an adjusting plate by four screws.
  • Page 84 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Using 9/64” hex key, remove 3 hex screws and flatwashers securing front source shielding. Set shield aside. Similarly, remove 4 screws and flatwashers securing source top shielding from source.
  • Page 85 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Using 9/64” ball driver, remove back two screws from below. Remove source. Remove the collimator from the old source and install it on the new source - 3 hex screws need to be removed.
  • Page 86 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.14 Shutter Drive Motor Assembly Removal / Replacement INTRODUCTION The shutter drive motor is located next to the x-ray source under a lead-shielded aluminum box at the left-side of the unit.
  • Page 87 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Using 1.5mm hex key, remove 3 screws securing shutter motor to bracket. REPLACE Reversal of removal. Ensure that set screw is seated on flat of shaft. Ensure that shutter blades are centered in shutter control assembly upon installation.
  • Page 88 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.15 Collimator Window Removal INTRODUCTION The collimator window is a thin Lexan shield located at the front of the x-ray source, behind the bronze-coloured metal collimator. The window can be access through the sliding door, with the case This window, if present, should be discarded.
  • Page 89 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Window, that is to be discarded, is located behind the collimator. Washer is between window and collimator. Window Collimator RE-INSTALL COLLIMATOR Ensure that collimator is re-installed so that opening is ’square’, and not on an angle.
  • Page 90 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.16 Detector Removal / Replacement INTRODUCTION The detector is bolted to the stand with four screws and lockwashers. TOOL LIST Standard toolkit SUPPLIES • Cable ties •...
  • Page 91 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Using 5/64” hex key, remove the ground cable from detector. Using 9/64” hex key, remove four screws and lockwashers securing detector to stand. Support detector while removing. Set aside.
  • Page 92 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.17 Fan 2.0625 (Below X-Ray Source) INTRODUCTION This fan is located below and to the rear of the x-ray source. It can be removed from the left-hand side and through the door with the case in place.
  • Page 93 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.18 Shutter Control Assembly Removal / Replacement INTRODUCTION The shutter control assembly. can be removed with the case on, through the door and with the left panel removed.
  • Page 94 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 6.2.19 Door Interlocks Removal / Replacement INTRODUCTION Interlocks The sliding door is equipped with an interlock and an mounted interrupt. inside case TOOL LIST Standard toolkit SUPPLIES...
  • Page 95 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Using 9/64“hex key, remove two screws securing interlock to bracket. Using Phillips screwdriver, open access cover and remove wires. 9/64" Using 3/8” socket, remove the four tamper- proof screws securing the switch mounting 3/8"...
  • Page 96 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Remove switch from mounting block with 5/64” hex key. 5/64" REPLACE Reverse of removal. FOLLOW-ON PROCEDURES None Page 96...
  • Page 97 NOTICE These calibration procedures are proprietary and confidential. Access to these procedures are restricted to GE Technical Service personnel only. NOTICE Refer to the Lockout & Tagout procedure in Chapter 1 before servicing the system.
  • Page 98 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.1.2 Calibration Kits eXplore Locus SP Calibration Kits contain the following items: • Detector Alignment Plate • Bebe Grid • X,Y Ball Centring tool and adjustment key •...
  • Page 99 • System Warm-Up (C:\Program Files\GE Medical Systems\eXplore Utilities\WarmupApp.exe) • Calibration Tools (C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration.exe) • X-Ray and Motor Controller. The X-Ray and Motor Controller (C:\Program Files\GE Medical Systems\eXplore Utilities\X_Ray_Controller.exe) • transgen program (C:\Program Files\GE Medial Systems\eXplore Utilities\Calibration\transgen.exe) 7.2.1 Mechanically Adjust Detector This mechanical adjustment ensures the detector and stage are correctly positioned.
  • Page 100 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE µA: Find the motor limit switch (this ensures that the limit switches will never be triggered): select Magnification from the drop down menu in the Motor field...
  • Page 101 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Loosen the 4 detector mounting bolts to adjust the detector alignment first. Shim the detector mounting bracket to adjust the elevation and twist the detector while the bolts are loose to adjust the azimuth.
  • Page 102 Warm-Up icon in the task bar and select the <=10 Minutes to Scan option once the cycle has finished (approximately 14 minutes), right-click the icon again and select Scan Mode. The System Warm-Up application can be re-initialized by double-clicking on WarmupApp.exe in C:\Program Files\GE Medical Systems\eXplore Utilities\ Page 102...
  • Page 103 UIDE Open the Calibration Tools program, click OK when the warning pop-up is displayed, then choose the Calib. Settings tab. Calibration Tools is located in C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration\. Click File and choose Read Registry Values from the drop-down menu.
  • Page 104 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE If not all the 11 x 14 bebes appear, turn off the X-Ray Source and physically move the grid so all 11 x 14 bebes are visible. Only complete rows and columns of bebes can appear on the screen.
  • Page 105 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Capture an Image: 21. Capture an image in Fluoro as follows: click Menu at the top of the Fluoro screen and choose Capture from the drop-down menu...
  • Page 106 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.2.3 Start Transform1 File Creation WHY DO THIS? The goal here is to remove the distortion caused by the fiber optic taper. This is accomplished by capturing a raw image of the bebe grid which is a known standard (equally spaced bebes). Using...
  • Page 107 Use Windows Explorer to rename the corrected image to corrected_grid.vff Run the transgen program. The transgen program is located in C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration\. Load the corrected_grid file into the transgen program. Adjust the Window (e.g. 2300) and Level (e.g. remove graininess) until there are minimal pixels visible except for the grid’s bebes.
  • Page 108 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 12. Manually divide this number by the number of spaces between the bebes (this number will be 10 if all bebes are visible). This is the average distance between the bebes. Make a note of this value (approximately 213) in the Worksheet.
  • Page 109 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 23. Access Calibration Tools and click the Transform tab. 24. Complete the Example VFF File field using Browse to find the corrected_grid.vff file. 25. Ensure the Source/Targets File field is set to C:\translations 26.
  • Page 110 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 34. Check that the unwarped corrected_grid file is straight by dragging another window edge over the rows and columns of bebes. Use the window’s edge as a ruler to ensure the bebes are perfectly aligned both vertically and horizontally.
  • Page 111 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Place the mouse position window over the bebe (to use the lines of the window as a reference point). Rotate the stage in both directions to determine the bebe’s outer most position.
  • Page 112 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 15. Rotate another 1 degree and capture the image. Name the image L7. Your captured images should approximate the following: 16. Rotate the bebe to the right side of the screen and repeat steps 6 to 15, naming each file R1 through R7.
  • Page 113 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 23. Record the centroid value (x & y coordinates). If desired, press the View Centroid button to view the calculated actual centre. You may have to Pan and Zoom to see the cross hairs.
  • Page 114 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 29. Press the Update button under Tilt Calculator. The Tilt value changes (value is usually less than 1 degree and can be either positive or negative.). 30. Select the Transform tab. The settings should reflect those entered during Start Transform1 File Creation (if blank, see steps 24-27 in Section 7.2.3).
  • Page 115 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.2.5 Create Transform2 & Transform4 Files Access Calibration Tools and click the Transform tab. Check the values of the following fields: Example VFF File: D:\calib\corrected_grid.vff Source/Targets File:...
  • Page 116 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Make note of the CS2 file’s two y coordinates in the Worksheet. Access Calibration Tools and select the Calculators tab. 10. Enter the 4 following values under Central Slice Calculator in the order below: y1a pos: enter the CS1 file’s top bebe’s y coordinate...
  • Page 117 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Capture an image in Fluoro and name it shim2. 10. Correct the shim1 file and unwarp it (using Transform1). 11. Load the corrected and unwarped file into MicroView.
  • Page 118 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE NOTICE Failure to provide a tip relief will cause the rail Equipment assembly to bend when the bolts are tightened. tip relief no tip relief Damage There should be at least 0.001" clearance at the tip Possible end.
  • Page 119 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Once the y axis equals the value at the Central Slice (within 2 pixels): Rotate the tool 180° and capture, correct, unwarp and view the image in MicroView. The value of this y axis must be within 2 pixels of the previous value before rotation (i.e.
  • Page 120 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Continue to adjust the stage and view the results until the y axis is within 2 pixels of the previous value (determined in step 6) after 180° of rotation. Use the Worksheet to record values.
  • Page 121 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Use the Rotation setting in X-Ray and Motor Controller to rotate the ball 180°, then rotate the ball again 180° (so the ball rotates 360°). Watch as the ball is rotating to ensure that the tip of the Precision Dial Indicator is touching the ball at all points of rotation and that it is not pegged.
  • Page 122 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 18. Once the ball has been centred, remove the Dial Indicator Mount and Precision Dial Indicator. 19. Select Magnification in the Motor field in the X-Ray and Motor Controller window and move the ball 70mm toward the detector.
  • Page 123 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 24. Threshold the image by sliding the Window slide bar to the left until it reads 0 and sliding the Level slide bar until the edges of the ball appears with the maximum amount of square edges.
  • Page 124 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 30. Use the X-Ray and Motor Controller’s Magnification setting to move the ball toward the X- Ray Source 140mm. 31. Capture the image calling the file capture.
  • Page 125 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Once confirmed (i.e. the values of the 2 geometric centres are the same + or - 1 pixel): 36. Carefully tighten the 4 bolts (snug only) once the values are close. Make the bolts sufficiently tight so that the adjustment wheel will operate but is difficult to turn.
  • Page 126 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Capture an image and name it D1. Move the tool back 100mm TO THE RIGHT (toward the X-Ray Source). Capture an image and name it D2. Turn off the X-Ray Source and remove Distance tool from the scanner.
  • Page 127 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 11. Repeat the above step in the black area of the screen. Note this value in the Worksheet. 12. Add the two mean values determined in the above 2 steps.
  • Page 128 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 16. Zoom in on the left edge of the image and position the cursor until the y axis equals the value of the Central Slice (determined earlier) and the x position is in the centre of the grey region.
  • Page 129 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 22. Access the Calculators tab in Calibration Tools and enter the following in the Source-Detector Distance Calculator: width1: enter line length of D1 width2: enter line length of D2 mag.
  • Page 130 Transform2 Transform4 Transform1.dat Transform2.dat Transform4.dat Copy these transform files to: C:\Program Files\GE Medical Systems\Explore Utilities\Parameters\ 10. Enable test protocols. Change 1x1wire.txt, 2x2wire.txt and 4x4wire.txt to 1x1wire.protocol, 2x2wire.protocol and 4x4wire.protocol. Files are located in C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols\. Page 130...
  • Page 131 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.2.11 Calculate & Edit Magnification Difference This calculation is done to accurately display measurements on the screen in millimeters. Install the Measured Plastic dowel into the small specimen tube and secure the dowel with foam.
  • Page 132 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 17. Change the Z-Size value to 1. 18. Click on the Recon button. 19. View the reconstructed image in MicroView. 20. Change the MicroView settings to display measurements in pixels: select Edit>Application Settings...
  • Page 133 The detector position, spacing, and current Mag_Diff values are found in the Calib. Settings tab of Calibration Tools. OBJ_POS can be found by opening the 2x2wire.protocol file in Notepad. This file is located in C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols\ 25. Calculate the Mag_Diff using the following equation (Mag_Diff should be approximately 70):...
  • Page 134 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE FIND THE IDEAL CENTRE OF ROTATION AT CENTRAL SLICE: Place the wire phantom in the small specimen tube, secure the wire phantom with foam, and mount the tube.
  • Page 135 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 23. Select Short Scan. This looks at the first 200 views instead of all 360 views. It will emphasize any errors in calibration. Click OK. 24. Press the Recon button in the Reconstruction Utility window.
  • Page 136 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 34. View the cropped area in MicroView upon completion. 35. Zoom in on individual wires. All 4 wires should be as round as possible. Round Wire Skewed Wire If all of the wires are not round, the Centre of Rotation needs to be adjusted as follows: a.
  • Page 137 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 36. Click the Advanced button in the Reconstruction Utility window, and choose the Reconstruction tab. 37. De-select the Short Scan field and click OK. 38. Click the Recon button in the Reconstruction Utility window.
  • Page 138 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 10. Change the centre of rotation back to the ideal found at the Central Slice and repeat the reconstruction with all 360 views (de-select the Short Scan field). Name the file 1x1wire_+end_360.
  • Page 139 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 17. Zoom in on the wire. Adjust the Window and Level to allow only two pixels to be visible. 18. Plot a line across the wire's two brightest pixels using the 1 and 2 keys in MicroView.
  • Page 140 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE The next step is to find the Full Width Half Maximum value of this wire in pixels. Note: All 4 wires must be symmetrical, but not necessarily completely round. How the wires appear may give you a clue about a possible problem.
  • Page 141 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 24. Move the mouse to the right line (side) and press 2 at the Full Width Half Maximum value point to draw a line from one side to the other.
  • Page 142 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.2.13 Follow Up Upon completion, back up calibration values. SAVE CALIBRATION SETTINGS Capture a screen shot of the calibration values found under the Calib. Settings tab in Calibration Tools.
  • Page 143 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Enter the following in the text box, then click OK: regedit 10. Once the Microsoft Registry Editor opens, click on the GEHC folder. 11. Click on File, then choose Export... from the drop-down list.
  • Page 144 This is done to protect the file so that it is not accidentally opened which would rewrite the registry. DISABLE TEST PROTOCOLS 19. Disable the test protocols by changing the 1x1wire.protocol, 2x2wire.protocol and 4x4wire.protocol files to: 1x1wire.txt 2x2wire.txt 4x4wire.txt Files are located in C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols\ Page 144...
  • Page 145 Copy the following files to a DVD: C:\translations1 all the transform and transform.dat files found in D: drive the D:\calib folder and the D:\detector folder the C:\Program Files\GE Medical Systems folder the newly created calibration_values.txt file all saved volumes (e.g. 1x1_wire_cs_360) the C:\Registry Backup folder.
  • Page 146 System Warm-Up (C:\Program Files\GE Medical Systems\eXplore Utilities\WarmupApp.exe) • Calibration Tools (C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration.exe) • X-Ray and Motor Controller. The X-Ray and Motor Controller (C:\Program Files\GE Medical Systems\eXplore Utilities\X_Ray_Controller.exe) 7.3.1 Mechanically Align the Stage Open Windows Explorer and navigate to D:/. Copy the calib folder and rename it original_calib.
  • Page 147 (approximately 14 minutes), right-click the icon again and select Scan Mode. The System Warm-Up application can be re-initialized by double-clicking on WarmupApp.exe in C:\Program Files\GE Medical Systems\eXplore Utilities\ Access the X-Ray and Motor Controller program. Page 147...
  • Page 148 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Ensure the fields below are set to the following settings: Enable Left Limit: checked off Enable Right Limit: checked off Camera: Thomson 8M Bin Mode: 1 x 1...
  • Page 149 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Capture an Image: 12. Capture an image in Fluoro as follows: click Menu at the top of the Fluoro screen and choose Capture from the drop-down menu...
  • Page 150 UIDE Correct the First Image: 23. Correct the captured image as follows: access the Calibration Tools program (located in C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration) click the Correct tab in the VFF to correct field, find the newly captured image (e.g.
  • Page 151 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 28. Double-click on the W and L parameters in the lower right of the screen. Change the Update mode to Delayed updates. This only needs to be changed once.
  • Page 152 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Note: The x values must be within 2 pixels of each other (e.g. if one value is 1140, the other must be within 1138 to 1142). Page 152...
  • Page 153 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE If the values ARE NOT within 2 pixels of each other: 31. Place shims under the elevation rail (loosen stage bolts, etc.). Note: One pixel is approximately .002" in shims. If the x value of the top bebe in Fluoro is less than the x value of the bottom bebe, the shim goes on the bottom of the stage.
  • Page 154 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE VERIFY STAGE TIP (SIDE-TO-SIDE MOVEMENT) 32. Move the ball toward the X-Ray Source (140mm right). 33. Elevate and rotate the tool until the top bebe appears in the centre of the screen.
  • Page 155 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Verify the Central Slice position: rotate the tool back 180 degrees move the stage 140mm toward the detector capture an image, correct and unwarp it load the image into MicroView and check that the y position is the same within 2 pixels. If the y position is not at the Central Slice at the detector end, the Central Slice calculation will need to be redone.
  • Page 156 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Mount the Dial Indicator Mount and Precision Dial Indicator. Adjust the tip on the Precision Dial Indicator to strike the equator of the ball. Make sure the Indicator is not pegged (i.e.
  • Page 157 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 13. Rotate the ball 180° and confirm the Dial Indicator reads zero. 14. Rotate the ball 90°. NOTICE 15. Carefully adjust the 2 screws that are aligned with the Dial Indicator until the Dial Indicator Equipment reads zero.
  • Page 158 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Find the Geometric Centre of the Ball at Detector End: Note: To find the geometric centre of the ball, determine the x value on the right and left side of the ball.
  • Page 159 This value should be close to the centre of rotation in the registry. Open Calibration Tools (located in C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration\). Click on Calb. settings tab. Click File, and choose Read Registry Values from the drop-down menu. The Centre of Rotation equals the value in Centre of Rotation1.
  • Page 160 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Note: The adjustment will change the ball’s geometric centre value 3 times faster when the stage is at the X-Ray Source end compared to an adjustment when the stage is at the detector end.
  • Page 161 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Enter 1x1wire in the Scan Description field (or 2x2wire or 4x4wire depending on which verification scans are being performed). The Scan Control window opens. Select 1x1wire from the Protocol drop-down list (or 2x2wire or 4x4wire depending on which verification scans are being performed).
  • Page 162 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 26. Select a region of interest that encompasses all 4 wires using the 7 and 8 keys in MicroView. 27. Select File>Save crop coordinates. 28. Exit MicroView.
  • Page 163 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 34. View the cropped area in MicroView upon completion. 35. Zoom in on individual wires. All 4 wires should be as round as possible. Round Wire Skewed Wire If all of the wires are not round, the Centre of Rotation needs to be adjusted as follows: a.
  • Page 164 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 36. Click the Advanced button in the Reconstruction Utility window, and choose the Reconstruction tab. 37. De-select the Short Scan field and click OK. 38. Click the Recon button in the Reconstruction Utility window.
  • Page 165 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 10. Change the centre of rotation back to the ideal found at the Central Slice and repeat the reconstruction with all 360 views (de-select the Short Scan field). Name the file 1x1wire_+end_360.
  • Page 166 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 17. Zoom in on the wire. Adjust the Window and Level to allow only two pixels to be visible. 18. Plot a line across the wire's two brightest pixels using the 1 and 2 keys in MicroView.
  • Page 167 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE The next step is to find the Full Width Half Maximum value of this wire in pixels. Note: All 4 wires must be symmetrical, but not necessarily completely round. How the wires appear may give you a clue about a possible problem.
  • Page 168 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 24. Move the mouse to the right line (side) and press 2 at the Full Width Half Maximum value point to draw a line from one side to the other.
  • Page 169 System Warm-Up (C:\Program Files\GE Medical Systems\eXplore Utilities\WarmupApp.exe) • Calibration Tools (C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration.exe) • X-Ray and Motor Controller. The X-Ray and Motor Controller (C:\Program Files\GE Medical Systems\eXplore Utilities\X_Ray_Controller.exe) 7.4.1 Centre X-Ray Source This adjustment properly positions the X-Ray Source. To adjust the X-Ray Source: Open Windows Explorer and navigate to D:/.
  • Page 170 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Find the motor limit switch (this ensures that the limit switches will never be triggered): select Magnification from the drop down menu in the Motor field press the Left (CW) Linear Home button to move the stage toward the detector enter 2 in the mm field, click on the right or CCW radio button, then press the Linear Stage Motion button to offset the "home"...
  • Page 171 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Capture an Image: 11. Capture an image in Fluoro as follows: click Menu at the top of the Fluoro screen and choose Capture from the drop-down menu...
  • Page 172 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 17. Mount the Dial Indicator Mount and Precision Dial Indicator. 18. Adjust the tip of the Precision Dial Indicator to strike the equator of the ball. Make sure the indicator is not pegged (i.e.
  • Page 173 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE NOTICE The tool is extremely delicate. Fine adjustments are required. DO NOT overtighten the screws. Equipment One screw turns clockwise and the other turns counter clockwise. Turn the screws in tandem Damage using as little torque as possible (i.e.
  • Page 174 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 34. Click the Turn X-Ray On button in the X-Ray and Motor Controller window and let the X-Ray Source warm up. 35. Capture an image in Fluoro as follows:...
  • Page 175 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Unwarp the Image: 37. Click the Unwarp tab in Calibration Tools and complete the fields as follows: in the VFF to unwarp: field use the Browse button to find the file D:\calib\corrected.vff...
  • Page 176 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 43. Threshold the image. Slide the Window slide bar to the left until it reads 0 and slide the Level slide bar until the ball appears with the maximum amount of square edges.
  • Page 177 UIDE The x value must eventually equal the centre of rotation in the registry (within 5 pixels). Open Calibration Tools (located in C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration\). Click on Calib. Settings tab. Click File, and choose Read Registry Values from the drop-down menu. The Centre of Rotation equals the value in Centre of Rotation1.
  • Page 178 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.4.2 Centre the Stage This procedure is used to centre the stage between the X-Ray Source and the detector. With the X,Y Centring Ball tool still mounted and the system warmed up: Use the X-Ray and Motor Controller’s Magnification setting to move the stage 140mm toward...
  • Page 179 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Place the mouse in the middle of the gray band that appears to the left of the black area. Make note of the x coordinate and round the coordinate to the nearest .5 pixel.
  • Page 180 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE c. Manually adjust the stage using the stage’s adjustment wheel (see Note below). This moves the stage perpendicular to the rail as shown here in the diagram.
  • Page 181 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.4.3 Calculate Central Slice of X-Ray Source This procedure calculates the Central Slice of the X-ray. With the X,Y Centring Ball tool still mounted and the system warmed up: Move the stage back toward the detector using the X-Ray and Motor Controller.
  • Page 182 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE d. Place the mouse over the bebe and press the Spacebar (the bebe’s solid centre turns green). e. Record the centroid value (y coordinate only). If desired, press the View Centroid button to view the calculated actual centre (see below).
  • Page 183 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 12. Press the Update button under Central Slice Calculator. 13. Make note of the Central Slice value (e.g. 1453.25) in the Worksheet. 7.4.4 Verify Stage Alignment VERIFY STAGE TILT (FRONT-TO-BACK MOVEMENT): Turn off x-rays and adjust the X,Y Centring Ball tool so that the bebes are facing the detector.
  • Page 184 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 13. Repeat steps 11 and 12 above (correct, unwarp & load into MicroView) for the shim2 file. 14. Make a note of the x value of the centre of the bebe using MicroView’s Region Grow tool, in the Worksheet.
  • Page 185 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE VERIFY STAGE TIP (SIDE-TO-SIDE MOVEMENT): Move the ball toward the X-Ray Source (140mm right). Elevate and rotate the tool until the top bebe appears in the centre of the screen.
  • Page 186 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE capture an image, correct and unwarp it load the image into MicroView and check that the y position is the same within 2 pixels. If the y position is not at the Central Slice at the detector end, the Central Slice calculation will need to be redone.
  • Page 187 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Turn off x-rays and remove the X,Y Centring Ball tool. 10. Move stage so that it is 40 mm from the detector. 7.4.5 Calculate Source to Detector Distance NOTICE Mount the Distance tool.
  • Page 188 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 11. Repeat the above step in the black area of the screen and record value in the Worksheet. Page 188...
  • Page 189 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 12. Add the two mean values determined in the above 2 steps. 13. Divide this value by 2 to determine the Half Maximum value. Note this value in the Worksheet.
  • Page 190 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 20. Record the line length (appears in the top left of the screen). Make a note of this value in the Worksheet. 21. Repeat the above steps 9 to 20 for the D2 image, recording values in the Worksheet.
  • Page 191 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.4.6 Edit Calibration Settings Access Calibration Tools and click the Calib. Settings tab. Click File and choose Read Registry Values from the drop-down list. Using the Worksheet, enter the Source-Detector distance in the Detector Position field three times for each binning mode (1x1, 2x2, 4x4), separating each with a space (e.g.
  • Page 192 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.4.7 Calculate & Edit Magnification Difference This calculation is done to accurately display measurements on the screen in millimeters. Install the Measured Plastic dowel into the small specimen tube, secure the dowel with foam, and note the size of the dowel (e.g.
  • Page 193 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 17. Change the Z-Size value to 1. 18. Click on the Recon button. 19. View the reconstructed image in MicroView. 20. Change the MicroView settings to display measurements in pixels: select Edit>Application Settings...
  • Page 194 The detector position, spacing, and current Mag_Diff values are found in the Calib. Settings tab of Calibration Tools. OBJ_POS can be found by opening the 2x2wire.protocol file in Notepad. This file is located in C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols. 25. Calculate the Mag_Diff using the following equation (Mag_Diff should be approximately 70):...
  • Page 195 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Note: Details concerning the following steps are found in the eXplore Locus SP User Guide. Refer to it for particulars. Warm up the X-Ray Source. Once warmed up, launch eXplore Scan Manager.
  • Page 196 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 26. Select a region of interest that encompasses all 4 wires using the 7 and 8 keys in MicroView. 27. Select File>Save crop coordinates. 28. Exit MicroView.
  • Page 197 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 34. View the cropped area in MicroView upon completion. 35. Zoom in on individual wires. All 4 wires should be as round as possible. Round Wire Skewed Wire If the wires are not round, the Centre of Rotation needs to be adjusted as follows: a.
  • Page 198 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 36. Click the Advanced button in the Reconstruction Utility window, and choose the Reconstruction tab. 37. De-select the Short Scan field and click OK. 38. Click the Recon button in the Reconstruction Utility window.
  • Page 199 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 10. Change the centre of rotation back to the ideal found at the Central Slice and repeat the reconstruction with all 360 views (de-select the Short Scan field). Name the file 1x1wire_+end_360.
  • Page 200 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 16. Zoom in on the wire. Adjust the Window and Level to allow only two pixels to be visible. 17. Plot a line across the wire's two brightest pixels using the 1 and 2 keys in MicroView.
  • Page 201 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE The next step is to find the Full Width Half Maximum value of this wire in pixels. Note: All 4 wires must be symmetrical, but not necessarily completely round. How the wires appear may give you a clue about a possible problem.
  • Page 202 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 23. Move the mouse to the right line (side) and press 2 at the Full Width Half Maximum value point to draw a line from one side to the other.
  • Page 203 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.4.9 Follow Up Upon completion, back up calibration values. SAVE CALIBRATION SETTINGS Capture a screen shot of the calibration values found under the Calib. Settings tab in Calibration Tools.
  • Page 204 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Enter the following in the text box, then click OK: regedit 10. Once the Microsoft Registry Editor opens, click on the GEHC folder. 11. Click on File, then choose Export... from the drop-down list.
  • Page 205 This is done to protect the file so that it is not accidentally opened which would rewrite the registry. DISABLE TEST PROTOCOLS 19. Disable the test protocols by changing the 1x1wire.protocol, 2x2wire.protocol and 4x4wire.protocol files to: 1x1wire.txt 2x2wire.txt 4x4wire.txt Files are located in C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols\ Page 205...
  • Page 206 Copy the following files to a DVD: C:\translations1 all the transform and transform.dat files found in D: drive the D:\calib folder and the D:\detector folder the C:\Program Files\GE Medical Systems folder the newly created calibration_values.txt file all saved volumes (e.g. 1x1_wire_cs_360) the C:\Registry Backup folder.
  • Page 207 • System Warm-Up (C:\Program Files\GE Medical Systems\eXplore Utilities\WarmupApp.exe) • Calibration Tools (C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration.exe) • X-Ray and Motor Controller. The X-Ray and Motor Controller (C:\Program Files\GE Medical Systems\eXplore Utilities\X_Ray_Controller.exe) • transgen program (C:\Program Files\GE Medial Systems\eXplore Utilities\Calibration\transgen.exe) 7.5.1 Centre the Stage This procedure is used to centre the stage between the X-Ray Source and the detector.
  • Page 208 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Find the motor limit switch (this ensures that the limit switches will never be triggered): select Magnification from the drop down menu in the Motor field press the Left (CW) Linear Home button to move the stage toward the Source enter 2 in the mm field, click on the right or CCW radio button, then press the Linear Stage Motion button to offset the "home"...
  • Page 209 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 10. Capture an image in Fluoro as follows: click Menu at the top of the Fluoro screen and choose Capture from the drop-down menu once the Capture pop-up is displayed, enter 1...
  • Page 210 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 18. Adjust the tip on the Precision Dial Indicator to strike the equator of the ball. Make sure the Indicator is not pegged (i.e. the small needle on the gauge, near the centre of the Dial Indicator, is around the halfway mark).
  • Page 211 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 26. Use the rotation setting to rotate the ball 360° (180° at a time). Watch as the ball is rotating to ensure that the tip of the Precision Dial Indicator is touching the ball at all points of rotation and that it is not pegged.
  • Page 212 UIDE Correct the Image: 35. Correct the captured image as follows: access the Calibration Tools program (located in C:\Program Files\GE Medical Systems\eXplore Utilities\Calibration) click the Correct tab in the VFF to correct field, find the newly captured image (e.g. capture)
  • Page 213 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 40. Double-click on the W and L parameters in the lower right of the screen. Change the Update mode to Delayed updates. This only needs to be changed once.
  • Page 214 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 44. Place the mouse in the middle of the gray band that appears to the left of the black area. Use the Worksheet to make note of the x coordinate and round the coordinate to the nearest .5 pixel.
  • Page 215 X-Ray Source largeball.vff. 57. Turn off the X-Ray Source. 58. Enable test protocols. Change 1x1wire.txt, 2x2wire.txt and 4x4wire.txt to 1x1wire.protocol, 2x2wire.protocol and 4x4wire.protocol. Files are located in C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols\. Page 215...
  • Page 216 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.5.2 Perform Verification Scans (1x1, 2x2 & 4x4 Modes) The following procedure is used to verify the calibration settings. Note: The ambient temperature in the room must be stable to perform this procedure i.e. the room temperature should not change even by 1 degree during the scanning process.
  • Page 217 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 17. Press the Recon button on the Reconstruction Utility window. 18. View the image in MicroView. Draw a line from the wire on the left side of the screen to the wire on the top using the 1 and 2 keys, and note the angle displayed in the top left of the screen in the Worksheet.
  • Page 218 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 32. Click the Full Res button. De-select the Mini-volume field. This allows you to name the resulting reconstructed volume. 33. Press the Recon button. Name the file 1x1wire_cs_ss.vff (or 2x2wire_cs_ss.vff or 4x4wire_cs_ss.vff depending on which verification scans are being performed)
  • Page 219 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE h. Make a note of this value in the Worksheet. This is the ideal Centre of Rotation at the Central Slice. 36. Click the Advanced button in the Reconstruction Utility window, and choose the Reconstruction tab.
  • Page 220 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Click the Recon button and view the image in MicroView. The wires should appear as round as possible. If the wires are not round, adjust the Centre of Rotation until the wires appear as round as possible.
  • Page 221 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 17. Zoom in on the wire. Adjust the Window and Level to allow only two pixels to be visible. 18. Plot a line across the wire's two brightest pixels using the 1 and 2 keys in MicroView.
  • Page 222 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE The next step is to find the Full Width Half Maximum value of this wire in pixels. Note: All 4 wires must be symmetrical, but not necessarily completely round. How the wires appear may give you a clue about a possible problem.
  • Page 223 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 24. Move the mouse to the right line (side) and press 2 at the Full Width Half Maximum value point to draw a line from one side to the other.
  • Page 224 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 7.5.3 Edit Calibration Settings Access Calibration Tools and click the Calib. Settings tab. Click File and choose Read Registry Values from the drop-down list. Complete the Centres of Rotation fields as follows:...
  • Page 225 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Copy D:\calib folder to C: drive. Copy C:\translations1 to D: drive. BACK UP REGISTRY If needed, add the following folder to the C: drive: Registry Backup Create a sub-folder under Registry Backup and label the folder with "today’s date" e.g.
  • Page 226 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 11. Click on File, then choose Export... from the drop-down list. 12. Under Save in, find the Registry Backup folder, then select the sub-folder labelled with today’s date.
  • Page 227 19. Disable the test protocols by changing the 1x1wire.protocol, 2x2wire.protocol and 4x4wire.protocol files to: 1x1wire.txt 2x2wire.txt 4x4wire.txt Files are located in C:\Program Files\GE Medical Systems\eXplore Utilities\Protocols\ BACK UP CRITICAL FILES TO DVDs Copy the following files to a DVD: C:\translations1 all the transform and transform.dat files found in D: drive...
  • Page 228 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Page 228...
  • Page 229 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Chapter 8 Preventive Maintenance Section 8.1 Preventive Maintenance (PM) Introduction 8.1.1 Why Do Preventive Maintenance? A preventive maintenance program monitors the equipment and guarantees the best results from good equipment performance.
  • Page 230 The following procedure is documented in "Blood Bourne Pathogens Procedure" (SER-01-0001). Note: This procedure may be periodically updated, therefore, see the latest version of the document in the GE Medical Systems files. Before any equipment is returned to GEMS or before equipment is serviced, the following criteria must be met: •...
  • Page 231 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Before cleanup take note of sharp note of sharp corners or objects that could cut the gloves. If gloves tear, remove, wash hands thoroughly and re-glove. Use cloth or paper towels along with cleaner, taking care not to splash the material.
  • Page 232 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.2.2 X-Ray Indicator Light Visually inspect the X-ray Indicator Light. Verify that when the X-Ray source is on, light is on. Verify that a buzz sounds for approximately 8 seconds 8.2.3...
  • Page 233 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE If X-Ray and Motor Controller indicates Safety door is opened, at least one of the four interlock switches is not closed properly. Check the electronic wiring of the interlock using a multi-meter: When all four interlocks are closed, pin 10 and pin 11 of connector 3 on the electronic flange should be a short circuit.
  • Page 234 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.2.5 Limit Switches on Magnification Stage Visually inspect each limit switch and verify that nothing is blocking the sensor of the limit switch. Access the X-ray and Motor Controller software and verify that sensor indicates it is clear.
  • Page 235 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.2.6 Specimen Slide Access the X-ray and Motor Controller software. Select Elevation from the drop down menu in the Motor field. Press the Left (CW) Linear Home button to move the stage up.
  • Page 236 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.2.10 Shutter Drive Motor Verify that the shutter disk is clear of obstacles. Access the X-Ray and Motor Controller software and press the Start Shutter button. Verify that the shutter initializes.
  • Page 237 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.2.13 Fan Behind The Detector Visually inspect that fan is running and blowing out. Feel for any abnormal vibration. Listen to verify that fan is not making extra noise (grinding or clicking).
  • Page 238 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.2.17 Equalization Bath Inspect the equalization bath and specimen holder and check for any cracking or discolouration. 8.2.18 Temperature Controller Verify that the system is running at approximately 12.98.
  • Page 239 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.2.19 Cables Check external cables and ensure they are neatly arranged (i.e. not tangled, and are not pinched by the any surrounding objects). 8.2.20 Gantry Check all internal cables are neatly secured with tie wraps.
  • Page 240 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE GENERAL CLEANING Using the anti-static vacuum with soft brush, carefully clean the interior, inlets and fan exhaust ports. Note: If the amount of dust is thick, remove it from the screens and fans by hand.
  • Page 241 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.2.23 Perform Periodic Abridged Calibration PERFORM ABRIDGED CALIBRATION • Verify Stage Alignment (see topic 7.4.4) • Perform Abridged Calibration (see topics 7.5.1 Centre the Stage, Perform Verification Scans 7.5.2, Edit Calibration Settings 7.5.3, Follow Up 7.5.4).
  • Page 242 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 8.3.2 Preventive Maintenance Performance Checklist √ Refer to Topic Perform PM Tasks Completed 8.2.1 Verified X-Ray Source Operational 8.2.2 Confirmed X-Ray Indicator Light Operational 8.2.3 Replaced Reset Switch LED 8.2.4...
  • Page 243 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE √ Refer to Topic Perform PM Tasks Completed 8.2.22 Acquisition Computer: Computer Maintenance List Available Free Space C: & D: ________________________ List Any Critical Errors/Alerts: _____________________________________________________ _____________________________________________________...
  • Page 244 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE This page is intentionally left blank Page 244...
  • Page 245 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Chapter 99 Appendix Purpose: This chapter provides support information and blank forms helpful when servicing the eXplore Locus SP. Section 99.1 Calibration Worksheets The following blank Worksheets may be used when calibrating the eXplore Locus SP. There are different sets of Worksheets depending on whether you are performing the following: •...
  • Page 246 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 99.1.1 Detector Replacement Calibration Worksheets TOPIC 7.2.2 FIND X-RAY MASK VALUES: Parameter Description Parameter Value Lowest X value in usable rectangle Top of the Y axis boundary...
  • Page 247 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Parameter Description Centroid X pos. Centroid Y pos. Parameter Description Parameter Value Tilt Calculator X1 pos. for left side Tilt Calculator Y1 pos. for left side Tilt Calculator X2 pos. for right side Tilt Calculator Y2 pos.
  • Page 248 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE TOPIC 7.2.7 VERIFY STAGE ALIGNMENT: Parameter Description Parameter Value Shim1 X value of center of top bebe Shim2 X value of center of top bebe Y axis of top bebe Top bebe (after 180º...
  • Page 249 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE TOPIC 7.2.9 CALCULATE SOURCE TO DETECTOR DISTANCE: Parameter Description Parameter Value D1 white area mean value D1 black area mean value D1 Half Maximum Value (see formula)
  • Page 250 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE TOPIC 7.2.12 PERFORM VERIFICATION SCANS FOR 1X1 MODE: FIND THE IDEAL CENTER OF ROTATION AT THE CENTRAL SLICE Parameter Description Parameter Value Line angle Existing air calibration value...
  • Page 251 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Resolution value Target value Maximum value Mean value of plastic Value at top of peak Full Width Half Maximum Value Line length in pixels Resolution value Target value Maximum value TOPIC 7.2.12 PERFORM VERIFICATION SCANS FOR 2X2 MODE:...
  • Page 252 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Date calibration was finished: _______________________________ Engineer doing calibration: ______________________________ Locus SP serial number: _____________________________ Customer: _____________________________ Page 252...
  • Page 253 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 99.1.2 Stage Replacement Calibration Worksheets TOPIC 7.3.1 MECHANICALLY ALIGN THE STAGE: Parameter Description Parameter Value Shim1 centroid value of bebe X axis Shim1 centroid value of bebe Y axis...
  • Page 254 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Ball geometric center X-value Center of Rotation X axis TOPIC 7.3.3 PERFORM VERIFICATION SCANS FOR 1X1 MODE: FIND THE IDEAL CENTER OF ROTATION AT CENTRAL SLICE Parameter Description...
  • Page 255 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Full Width Half Maximum Value Line length in pixels Resolution (on right side of Scan Mgr Window) Target value in pixels of wire scan Mean value of black area...
  • Page 256 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Date calibration was finished: _______________________________ Engineer doing calibration: ______________________________ Locus SP serial number: _____________________________ Customer: _____________________________ Page 256...
  • Page 257 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 99.1.3 X-Ray Source Replacement Calibration Worksheets TOPIC 7.4.1 CENTRE X-RAY SOURCE: Parameter Description Parameter Value Right side of ball X axis Left side of ball X axis...
  • Page 258 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE TOPIC 7.4.2 CENTRE THE STAGE: Parameter Description Parameter Value Left side of ball X axis (toward detector) Window= Level= Right side of ball X axis (toward detector)
  • Page 259 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE TOPIC 7.4.4 VERIFY STAGE ALIGNMENT: Parameter Description Parameter Value Shim1 X value of center of top bebe Shim2 X value of center of top bebe Difference between X1 and X2 (near detector)
  • Page 260 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE D2 Mean value of white area D2 Mean value of black area D2 Half Maximum Value (W+B)/2= D2 Line length Source-Detector Distance TOPIC 7.4.6 EDIT CALIBRATION SETTINGS:...
  • Page 261 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE TOPIC 7.4.8 PERFORM VERIFICATION SCANS FOR 1X1 MODE: Parameter Description Parameter Value Line angle Existing air calibration value Existing water calibration value Existing HU calibration value Ideal Center of Rotation at Central Slice...
  • Page 262 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Resolution value Target value in pixels (.025/R)= Maximum value (Target value + 2) Mean value of plastic (WIRE # 4) Value at top of peak Full Width Half Maximum Value...
  • Page 263 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Ideal Center of Rotation at Central Slice Date calibration was finished: _______________________________ Engineer doing calibration: ______________________________ Locus SP serial number: _____________________________ Customer: _____________________________ Page 263...
  • Page 264 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE 99.1.4 Abridged Calibration Worksheets TOPIC 7.5.1 CENTRE THE STAGE: Parameter Description Parameter Value Window= Level= Left side of ball X axis (toward detector) Right side of ball X axis (toward detector)
  • Page 265 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Resolution value Target value in pixels (.025/R)= Maximum value (Target value + 2) Mean value of plastic (WIRE # 2) Value at top of peak Full Width Half Maximum Value...
  • Page 266 GE H EALTHCARE 5158821-100, R SP S IRECTION EVISION PLORE OCUS ERVICE UIDE Existing air calibration value Existing water calibration value Existing HU calibration value Ideal Center of Rotation at Central Slice TOPIC 7.5.2 PERFORM VERIFICATION SCANS FOR 4X4 MODE:...