Chapter 9 Page no. 1686
JC-CAL-A-029.fm
GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card CAL A029 - Collimator Format Calibration
3. A displayed offset is out of specification after reinstallation of the collimator and Tube Tilt Calibra-
tions.
The action to be taken depends upon the blade offset in error. Manually adjust the position of the col-
limator, as follows:
a. Rotate the Arm to +180° so that the Tube Head is upside down.
b. Loosen the collimator by loosening the collimator’s four screws (7).
c. Move the collimator according to the blade offset in error that you witnessed, as follows:
If the rear blade offset is out of specification, pull the collimator towards the patient, and then
tighten all of the four screws.
If the right blade offset is out of specification, push the collimator fully towards the right. Then first
tighten the screws the two screws on the right, and then tighten the two screws on the left.
If the left blade offset is out of specification, push the collimator fully towards the left. Then first
tighten the screws the two screws on the left, and then tighten the two screws on the right.
d. Repeat the full calibration procedure from section 6-2.
e. If one of the displayed values is still out of specification, continue with step 4.
4. A displayed offset is out of specification after reinstallation of the collimator, after detector and tube
checks have been made, and after the manual collimator adjustments have been made.
The collimator must be changed.
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