GE Senographe DS Manual page 682

GE Healthcare
Revision 1
Job Card ELE A028 - Collimation Checks
6. When placing each of the XR-M film strips, ensure that edge of the light field is aligned with the X
marker on the XR-M film strip.
Edge of light field
Note:
When aligning the light field with the X marker on the XR-M film strip, to ensure the light edges are
sharply resolved light, it is recommended that you perform this aligment with the room lights off.
Note:
At the anterior edge of the light field (opposite the chestwall edge), the Bucky cover might obstruct
the XR-M, such that it cannot lie flat with the surface of the aluminium attenuator. If there is ob-
struction from the Bucky, align the "-2" reference line of the XR-M film (instead of the "X" reference
line) so that the XR-M film avoids the obstruction and can lie flat with the surface of the aluminium
attenuator.
Chapter 7
Service Information and Procedures Class A 2385072-16-8EN
Anterior edge of
light field
Page no. 682
Senographe DS
There may be a shadow towards
the edge of the light field. Ensure
the X marker is on the outer edge
of the shadow.
Inner edge
Outer edge
Bucky cover can obstruct the XR-M
film such that it does not lie flat
against the aluminium attenuator.
Repositioning the XR-M film to use
the "-2" reference instead of the "X"
reference can avoid the obstruction
from the Bucky cover.
JC-ELE-A-028.fm