GE Advantium CT9800, Technical Publications

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GE MEDICAL SYSTEMS CT 9800 QUICK SYSTEM
Rev. 12
Direction 18000
6-9-1
SECTION 9 X-RAY ALIGNMENT FOR XENON DETECTOR SYSTEMS
If you are performing alignments on a system with HiLight detector, skip this section and perform section
9A instead.
9-1 Requirements
1. This section describes the requirements for X-Ray alignment, position of the critical components and
procedures to achieve the required alignment specifications. The critical components for alignment are the
tube unit, collimator, and the detector. The same procedures are used for functional check as well as
adjustment. Some steps in the adjustment procedure may be omitted on replacement of one of the three
critical components.
2. Tools and materials required for Xenon detector system alignment are listed below:
a.
Polaroid type 52 film packs.
b. Polaroid type 45 film holder (developer for type 52 film).
c. Vernier Caliper 0-6” graduated in 0.005 or 0-15 cm graduated in 0.1mm.
d. Dial indicator 46-195935P1: Graduation 0.001”, range 0.250” scale 0-50-0 Part of 8800 alignment kit
46-195936G1.
e. Masking tape
f. Service hand tools with 3/8 deep socket set.
g. Torque wrench; 3/8 socket drive 0-25 ft.lbs.
h. Nut and bolt for dial indicator. 46-198393G1 Bolt; 46-198395P1 Nut.
i. Pocket comparator with reticle. Edscorp No. 41055.
j. Detector clamp kit 46-229753G1.
3. All components critical to X-Ray alignment are mounted directly to the rotating gantry structure as shown in
Illustration 6-9-1. The collimator includes a body-air filter assembly and an adjustable beam defining exit slit.