GE CT-9800

GE MEDICAL SYSTEMS CT 9800 QUICK SYSTEM
Rev. 6 Direction 18000
6-10-17
CAUTION: The alignment light adjustment screws must be handled carefully, i.e., do not
overtorque the screws. Failure to heed this caution, may cause damage to the
alignment light adjustments.
In general, the screw adjustments for setting up the left and right external axial lights are as follows. Refer to
Ill. 6-10-9:
--- Screw “A” moves the beam up and down.
--- Screw “B” and “C” will move the beam in and out from the mounting surface.
--- Screw “D” locks the final adjustments in place.
--- Screws “E” and “F” are loosened to rotate the disc lens. Rotate the disc lens to remove any scew in the
beam (i.e., situation where the beam is angulated with the scan plane).
--- Screws “G” and “H” are loosened to rotate the lens mount. Rotate the lens mount to straighten a curved
external axial line as viewed on the gantry cover.
Proceed as follows to align the left and right external axial light:
1. Back off locking screw “D” (Illustration 6-10-9).
2. If the beam is not reflecting off the mirror at all, then adjust screws “A”, “B”, and “C” together to move the
mirror into the path of the beam.
3. Adjust screws “B” and “C” to center the left or right beam within the white stripe of the ”external” notch on the
respective side of the laser alignment tool (see Ill. 6-10-2 for location of notch.
4. If necessary, loosen screws “E” and “F”. Rotate the disc lens so that the beam from both the left and right
external light falls within all white stripes around (i.e., no beam is scewed so that part of the beam is in and
another part is out of the white stripe). Re-tighten screws “E” and “F”.
5. The small square shaped mirrors around the alignment tool can be used to reflect the beam back onto the
aperture source. The reflected beam from a mirrors should coincide with the incident beam source from the
opposite aperture.
6. If the desired circular light pattern around the front of the gantry has a curvature to it, loosen screws “G” and
“H” and slightly rotate the lens until the laser line is straight. Re-tighten screws “G” and “H”.
7. Tighten locking screw “D”.