Chapter 4: Moving and Positioning
Definium AMX 700 X-Ray System
5161515-1EN
Rev. 6 (10 February 2008)
4-8
Operator Manual
© 2008 General Electric Company. All rights reserved.
3. Use the tape measure on the side of the collimator to measure the SID (source-to-image distance).
4. Collimate by adjusting the size of the field with the two control knobs located on the front of the
collimator (Figure 4-10).
For fine positioning of the collimator, see Step 5.
The left knob controls the transverse dimension of the blades. A diagram on the face of the
collimator shows which knob controls which dimension (Figure 4-10).
Field size from 0x0 inches and up to 17x17 inches (43x43 cm) at the 40 inch (102 cm) SID can be
obtained. The knob selectors indicate the field size for a selected SID.
Dial numbers on the calibrated scale are for a 40 inch (100 cm) and 72 inch (180 cm) scale SIDs.
Figure 4-10
Collimator controls
5. You may rotate the collimator about its vertical axis (that is, to the right or left) in two ways: by a
simple 90° detent method or by a manual lock method for an angle other than 90°.
90-degree detent method: Pull out the knob (Figure 4-11) and rotate the collimator to the desired
90° detent position. The detent will snap in place and lock.
Manual lock method: Pull out the knob, position the collimator to the desired angle (other than 90°
detent), and turn the knob clockwise to secure. (Turn the knob counterclockwise to unlock the
collimator and reposition.)
Figure 4-11
Collimator rotation knob
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