GE CT-9800 User Manual

GE MEDICAL SYSTEMS CT 9800 QUICK SYSTEM
Rev. 1 Direction 18000
6-3-3
3-3 Mag Tape Adjustments (Continued)
f. The Read, Write and Spacing commands specify the number of records to be read, written, etc.
If the word count (WC) is 37777, 100 records can be read, written or spaced in approximately
40 seconds. The number of records in a command can be adjusted depending on the amount of
time desired for an adjustment.
g. The space forward command sometimes does not work if the tape is at BOT and the tape is
blank or has been written in the other density mode. If this difficulty is encountered, write the
desired number of records, rewind, and then space forward.
h. If using the space backward command to reach BOT, specify a large number of records. The
tape will stop at BOT rather than wind off the end of the tape.
B. Tape Path Alignment
Refer to the procedure in the 6026 Manual, Part 4 Maintenance Manual, Chapter V. When necessary, load
the Command String Interpreter as previously described in procedure A. A Skew Tape (46-186572P235) is
required for this procedure.
To move the tape forward, type the underlined:
UNIT 0 ’CR’
TAPE MODE ’CR’
WC 37777 ’CR’
DATA ’CR’
COMMAND STRING
SPA FOR 100 ’CR’
To move the tape backward:
UNIT 0 ’CR’
TAPE MODE ’CR’
WC 37777 ’CR’
DATA ’CR’
COMMAND STRING
SPA BAC 100 ’CR’

GE CT-9800 Specifications

General

Brand	GE
Model	CT-9800
Category	Medical Equipment
Language	English

Summary

IMPORTANT! ... X-RAY PROTECTION

CERTIFIED ELECTRICAL CONTRACTOR STATEMENT

Specifies requirements for electrical installations and personnel qualifications for servicing.

DAMAGE IN TRANSPORTATION

Procedures for handling and reporting shipping damage to equipment.

OMISSIONS & ERRORS

Instructions for reporting documentation errors or defects.

HOW TO USE THE 9800 MANUALS

SECTION 1 INTRODUCTION

1-2. System and Option Component Identification

Details on identifying system components and options, including H.H.S. certification.

1-3. H.H.S. Certification; Field Tests; and Record Forms

Information on H.H.S. certification, regulatory standards, and required documentation.

SECTION 2 ENVIRONMENTAL

2-1. Temperature

Importance of temperature checks and cooling requirements for system components.

2-2. Power Line Checks

Procedures for monitoring line voltage, disturbances, and ensuring equipment specifications are met.

2-3. Ground Continuity Check

Steps to verify system grounding integrity and electrical connections.

2-4. System Power and Load Distribution

Procedures for verifying power application, phase sequence, and load distribution.

2-5 X-Ray Line Transformer and Jumper Settings

Guidance on X-ray line transformer settings and jumper configurations.

2-6 Power Interlocks

Procedures for testing power interlocks and computer thermostat functionality.

2-7 Emergency OFF

Procedures for testing the SEO system emergency OFF and table/console emergency OFF.

SECTION 3 DATA PROCESSING ADJUSTMENTS

3-1 Alpha-numeric System Adjustments

Referrals to procedures for alpha-numeric adjustments in the Display Subsystem Manual.

3-3 Mag Tape Adjustments

Procedures for adjusting the 6026 Mag Tape Drive, including command string usage.

3-4 Disk System Adjustments

Procedures for disk system adjustments, referencing Data General documentation.

SECTION 9 X-RAY ALIGNMENT FOR XENON DETECTOR SYSTEMS

9-1 Requirements

Specifies requirements for X-Ray alignment and critical components.

9-2 Adjustment of Components For X-ray Alignment on Xenon Detector Systems

Details physical positioning of tube, detector, and collimator for X-ray alignment.

9-4 Plane Of Rotation (Requires a cold tube)

Checks and adjusts X-ray fan beam plane of rotation for perpendicularity.

9-5 Xenon Detector Beam On Window (Requires a cold tube)

Checks and adjusts Xenon detector window position for beam interception.

9-6 Tube Output and Detector Channel Check

Verifies tube output and normal channel output for integrity.

9-7 ISO Alignment (Requires a cold tube)

Aligns tube focal spot with detector center for accurate spatial sampling.

9-8 Xenon Detector CBF Alignment (Requires a cold tube)

Aligns body filter center with ISO alignment for Xenon detectors.

9-9 System Sag

Measures alignment changes and hysteresis in channel numbers during rotation.

9-11 Xenon Detector Q Cal Intensity

Checks channel 1 intensity for detector wedge verification.

9-12 The following records and data should be saved for H.H.S. purposes after completing x-ray alignment

Specifies records to be saved for H.H.S. purposes after X-ray alignment.

9-13 Steps Following X-ray Alignment of Xenon Detector Systems

Steps to follow after X-ray alignment, including Q cal file creation.

SECTION 9A - X-RAY ALIGNMENTS FOR HILIGHT DETECTOR SYSTEMS

9A-1 Requirements

Outlines requirements for X-ray alignment on HiLight detector systems.

9A-2 Adjustment Of Components For X-Ray Alignment

Details positioning of tube, detector, and collimator for HiLight X-ray alignment.

9A-7 Radial Alignment

Procedure for adjusting detector radial position after installation or removal.

9A-7 ISO Alignment

Aligns tube focal spot with detector center for HiLight systems.

9A-8 HiLight CBF Alignment (Requires a cold tube)

Aligns body filter center with ISO alignment for HiLight detectors.

9A-9 System Sag

Measures alignment changes and hysteresis in channel numbers during rotation.

SECTION 10 ALIGNMENT LIGHT ADJUSTMENT

10-1 Introduction

Overview of alignment adjustments and laser safety precautions.

10-2 Recommended Alignment Sequence

Step-by-step sequence for performing comprehensive alignment procedures.

10-3 - Special Tools and Preliminary Procedures

Lists necessary special tools and preliminary steps for alignment.

10-4 Laser Alignment Tool Setup

Instructions for properly installing and centering the laser alignment tool.

10-5 - Alignment of Internal Axial Laser Lights, Left and Right

Procedures for aligning internal axial laser lights for beam centering.

10-6 - Alignment of Sagittal Laser Light

Procedures for aligning sagittal laser light and adjusting beam positioning.

10-7 - Alignment of Coronal Laser Light, left and right

Procedures for aligning coronal laser lights and adjusting beam positioning.

10-8 Alignment of External Axial Laser Lights, Left and Right

Procedures for aligning external axial laser lights and adjusting beam positioning.

SECTION 11 TABLE TO GANTRY ALIGNMENT

11-1 Vertical Plane Of Table Perpendicular To Scan Plane

Verifies table perpendicularity to scan plane using laser alignment tool.

11-2 Centering the Table In the Scan Plane

Centers table in scan plane after perpendicularity is confirmed.

APPENDIX A BMC / ERCC & HIB Switch & Jumper Settings

SECTION 1 SYSTEM INTERCONNECT (DRAWING)

7-4 SYSTEM POWER MODULE SCHEMATIC

SECTION 1 HOW TO USE 9800 DIAGNOSTICS

1-1 R-Level

Explanation of R-level commands and available system options.

1-2 CTDS Programs

Details on accessing and using CTDS diagnostic programs from tape.

1-3 STATE$REP.TM

Information on the STATE$REP.TM file for tracking disk drive status and ECC errors.

SECTION 2 CTEX SERVICE PROGRAMS

2-1 - RECON SHUTDOWN

Explains RECON SHUTDOWN messages and troubleshooting steps for failed reconstructions.

2-2 - Release Notices

Information on software changes and known issues from release notices.

SECTION 3 ERROR LOG

3-1 Entering the Log

Steps to enter the system error log for review and analysis.

3-2 - Examining An Error Report

Guidance on analyzing error reports, identifying sequences, and determining causes.

3-3 Identify Error Type

Explains error message formats and how to decode them using system software.

3-4 Error Log Breakpoints

Procedures for partitioning error logs by setting breakpoints for better management.

SECTION 4 SYSTEM ERRORS

4-1 - Panic Codes

Details panic codes posted to the console upon major system faults and suggested actions.

4-2 - Fortran/RDOS Codes

Lists system errors posted as Fortran or RDOS codes and their parameters.

4-3 - System Hang Crash Tape

Procedure for creating a Crash Tape for system hang analysis.

SECTION 5 DATA PROCESSING SUBSYSTEM

5-1 - Problem Isolation

Steps to isolate problems within the computer, disk drive, or mag tape drive.

5-3 - Disk Drive

Primary references and checkout procedures for Zebra and Argus disk drives.

5-4 - Mag Tape Drive

Technical manual references and troubleshooting procedures for the Mag Tape Drive.

SECTION 6 AP DIAGNOSTICS (ST-CT)

6-1 Can we talk - at all?

Initial tests to determine if S140 and ST-CT processors can communicate.

6-6 UPAP FAILURES AND SOLUTIONS

Common errors related to UPAP and their resolution steps.

6-7 COMMON “M” LEVEL ERRORS AND THEIR SOLUTIONS

Troubleshooting common errors encountered at the "M" level of system operation.

6-8 COMMON KERNEL ABORT CODES AND THEIR SOLUTIONS

Identifies kernel abort codes and provides solutions for AP hardware failures.

SECTION 7 TROUBLESHOOTING HINTS

7-4 Image Aliasing and ISO Alignment Errors

Explains image aliasing and ISO alignment errors, with troubleshooting suggestions.

7-6 Mag Tape Errors

Troubleshooting common issues encountered with mag tape drives.

7-7 Image Artifacts (Streaks)

Troubleshooting image artifacts like streaks when the system is unresponsive.

SECTION 8 AUTOTEST and AUTOTSUMMARY

8-1 Introduction

Introduction to AutoTest and AutoSummary for identifying center artifacts.

8-2 AutoSummary

How AutoSummary filters and organizes AutoTest log data for analysis.

8-4 Interpreting AutoSummary Results

Guidelines for understanding AutoSummary results and determining appropriate actions.

8-5 Artifact Troubleshooting Tips

Common causes of image quality issues and artifacts to resolve before AutoSummary.

8-6 Getting Detector Identification Numbers

Procedure for obtaining detector identification numbers from the rating plate.