Chapter H - CEPHALOSTAT
ProMax X-ray unit with Dimax3 H-3
ADJUSTMENTS AND CALIBRATIONS
Technical manual
1.2 Preparations before adjustments
Switch the unit off. Remove the housing of the cephalostat head support, see section 4.1
“Removing the housings of the head support” on page H-62.
Remove the second primary collimator according to the instructions given in section 2
“REMOVING AND ATTACHING THE SECOND PRIMARY COLLIMATOR” on page H-53.
Remove the tube head cover and the C-arm inner cover, refer to section 3 “REMOVING THE
COVERS” on page E-85.
If the cephalostat is equipped with movable sensor head, detach the sensor head and
remove the sensor head connector covers according to the instructions given in section 3.1
“Cephalostat with movable sensor head” on page H-55.
If the cephalostat is equipped with fixed sensor head, see section 3.2 “Cephalostat with
fixed sensor head - removing and attaching the sensor head” on page H-59.
1.3 Checking and adjusting the sensor head and second
primary collimator mutual position
The sensor head must be in line with the second primary collimator. Check the positions as
follows.
Move the scanning mechanism to center position. For both the sensor head and the second
primary collimator the right corner of the sledge must hit the circle on the digital cephalostat
frame as shown on the figure below.
Figure 7
If the sensor head sledge does not hit the circle on the digital cephalostat frame at the same
time as the second primary collimator sledge, the sensor head position must be adjusted.
PXR_Adj_digiceph1.eps
Sledge
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