GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A028 - Collimation Checks
Page no. 691
Chapter 7
JC-ELE-A-028.fm
2. The X-ray field must extend beyond all edges of the active image receptor. The X-ray field must not
extend beyond any edge of the image receptor by more than that quoted in
.
For each of the exposure configurations below, enter the determined deviations between the edge of
the X-ray field and the edge of the image receptor in the plane of the image receptor for each of the
four XR-M film strips. That is, the value Z
i
for each XR-M film strip determined in step
of
For each of the exposure configurations below, determine whether the action limit for each edge has
passed or failed according to the table below (see illustration 1 on
for film positions):
TABLE 1 - X-RAY FIELD - IMAGE RECEPTOR ACTION LIMITS
Mo/Mo
Rh/Rh
Film
Edge
Action Limit
A
Left
• If Z
i
is below 10 mm, the test has passed, and no further action
required.
• If Z
i
is between 10 mm and 13.2 mm, the test may have failed.
Consult the physicist regarding the local requirements, and if the
test has failed re-calibrate the Collimator according to
CAL A029 - Collimator Format Calibration
,
then re-
perform the Collimator Checks.
• If Z
i
is above 13.2 mm, the test has failed. Re-calibrate the Colli-
mator according to
Job Card CAL A029 - Collimator Format Cali-
then re-perform the Collimator Checks.
D
Right
B
Anterior
C
Posterior (chest wall)
• If Z
i
is between 4 mm and 7 mm, the test has passed, and no fur-
ther action required.
• If Z
i
is between 0 mm and 4 mm or between 7 mm and 10 mm, the
test may have failed. Consult the physicist regarding the local
requirements, and if the test has failed re-calibrate the Collimator
according to
Job Card CAL A029 - Collimator Format Calibration
then re-perform the Collimator Checks.
• If Z
i
is above 10 mm, the test has failed. Re-calibrate the Collima-
tor according to
Job Card CAL A029 - Collimator Format Calibra-
,
then re-perform the Collimator Checks.
Film
Edge
Z
i
Pass / Fail / Comment (see
A
Left
D
Right
B
Anterior
C
Posterior (chest wall)
Film
Edge
Z
i
Pass / Fail / Comment (see
A
Left
D
Right
B
Anterior
C
Posterior (chest wall)
