Collimator Field And Linear Laser Lights - GE Optima XR646 Operator's Manual

Figure 8-14 Multi-leaf collimator display
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Table 8-9 Multi-leaf collimator display
Item
1 X-ray Field of View (FOV)
 PBL = Positive-Beam Limitation (Automatic format collimation system)
 Manual = manual mode of collimation
2 Spectral Filter Selection display
3 Width and Height display of collimated X-ray field
4 Film-Focus Distance (SID) display
Note: The display of the SID and collimator FOV can be configured for either English or metric units.
Note: To check automatic collimation functionality, switch to automatic mode, then select an FOV dif-
ferent from current size. Check that the FOV is automatically adjusted to the newly selected FOV.
To undersize the current FOV, manually turn the collimator knobs. If FOV does not match collima-
tor display in either auto or manual mode, contact a GE service representative.

Collimator Field and Linear Laser Lights

The collimator light switch toggles both the centering cross and the linear laser lights on and off
(Figure 8-15). The centering cross is used to display the longitudinal and transverse axis of the exposure
field on the receptor or directly on the patient. This identifies the field that will be exposed. The linear
laser light provides an axis mark, which is lined up with the centering mark on the handle of the digital
receptor. This allows you to verify that your collimator is centered with the receptor. The laser light slider
is used to open and close the aperture for the laser light, allowing you to show or hide the laser beam.
5495975-1EN Rev.9
© 2013-2017 General Electric Company. All rights reserved.
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Chapter 8: System Hardware Overview
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Description
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