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CAUTION
QAP accessory (flat field phantom) must be removed before power off.
Figure 8-16 Collimator Locking Lever
Rotating the Multi-leaf Collimator
For certain exams, such as extremities, you may need to align the collimator field with the anatomy to be
exposed. The collimator can be rotated 90 degrees around the vertical axis, by releasing the collimator
locking lever
(Figure
8-17).
Figure 8-17 Rotating the collimator
CAUTION
Always grasp the multi-leaf collimator in such a way that neither hand can be
pinched or crushed between the handles and the collimator.
Follow this process to rotate the collimator around the vertical axis.
1. Move the rotating locking lever on the collimator toward the front panel, i.e. toward you. This releases
the collimator from the 0 lock-in position.
2. Grasp the multi-leaf collimator with both hands.
3. Rotate it to the desired angle and direction.
4. Return the locking lever to its original position. This prevents further rotation.
5495975-1EN Rev.9
© 2013-2017 General Electric Company. All rights reserved.
Chapter 8: System Hardware Overview
8-31
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