Acteon X-MIND prime 3D ceph - Page 279

Service Manual – Corrective maintenance
SERVICE MANUAL • X-MIND prime 3D • (19) • 11/2019 • NXMPEN080A
277
Adjustments
If the B1 and B2 measures are not in the prescribed tolerances and/or the upper
and lower borders are of the Primary-fully.bmp image are not fully irradiated:
1. Enter the SET-UP mode, open “Unit setting configuration” window
and select Collimator offsets” tab (refer to paragraph 8.4)
2. Adjust the W6-ceph window “Vertical position – VO” and “Vertical
width - VW ” according to the following conventions:
The vertical position (VO) offset allows to move the window towards the
Top/Bottom border of the acquisition area without modifying the window height
(P3 and P4 blades distance remains unchanged)
OFFSET
EFFECT ON ACQUIRED IMAGE (measuer of B1 and B2)
VO [+]*
Move the collimator window DOWN
Increase B1 and decrease B2 of the same distance
VO [-]*
Move the collimator window UP
Decrease B1 and increse B2 of the same distance
The vertical width (VW) offset allows to increase/ decrease the collimator height
by moving only the P3 collimation blade
OFFSET
EFFECT ON ACQUIRED IMAGE (measure of B1 and B2)
VW [+]*
REDUCE B2 by moving the P3 blade towards the bottom edge
of the sensor acquired area without moving the P2 blade
VW [-]*
INCRESE B2 by moving the P3 blade towards the top edge of
the sensor acquired area without moving the P4 blade
*Note: The symbols [+] and [-] mean, respectively, an increase and a decrease of
the offset value.
Primary collimator blades numbering