Rotate The Tube; Adjust The Collimator - GE Definium AMX 700 Operator's Manual

Rotate the Tube

Because the tube assembly is counterbalanced, no active lock is required. And little effort is needed to
override friction and rotate the tube.
1. Use the collimator handles to position the tube to the desired angle.
You may rotate the tube in two directions:
– clockwise and counterclockwise +180 degrees (detents at every 90 degrees), or
– backwards -10 degrees and forwards +100 degrees (detent at 0 degree). See Figure 4-9.
Figure 4-9 Tube rotation

Adjust the Collimator

The Definium AMX 700 manual collimator limits patient radiation exposure to a desired area at a given
distance from the x-ray tube focal spot.
1. Press the field light button (on either the collimator face or hand switch) to activate the high-intensity
field lamp. The cross-hair beam shows the field center
The field light is timed and automatically turns off 30 seconds after you release the switch. To
adjust the field light timer, contact your service representative.
To activate the field light for another 30 seconds, press the button again when the light goes out.
(You may keep the field light on for up to 4 minutes. After 4 minutes, the field light will turn off for
cooling and remain inactive for 5 minutes.)
You may take an exposure while the field light is on; the light will automatically turn off when an
exposure is taken.
2. Position the collimator and tube using the field light and cross-hair as guides. The cross-hair shows
the field center. For fine positioning of the collimator, see Step 5.
Definium AMX 700 X-Ray System
Operator Manual
5161515-1EN Rev. 6 (10 February 2008)
© 2008 General Electric Company. All rights reserved.
Chapter 4: Moving and Positioning
1. Collimator rotation knob
2. X-ray tube
3. Retractable arm
4. 110° (Forward)
5. -10° (Backward)
6. 0° Detent
4-7