Chapter 7 Page no. 692
JC-ELE-A-028.fm
GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A028 - Collimation Checks
3. The chest wall edge of the compression paddle must be aligned just beyond the chest wall edge of
the image receptor, such that the chest wall edge of the compression paddle does not appear in the
mammogram. In addition, the chest wall edge of the compression paddle must not extend beyond
the chest wall edge of the image receptor by more than 1% of the SID.
Enter the determined deviation between the alignment of the edge of the compression paddle and
the edge of the image receptor in the plane of the image receptor for the coin. That is, the value Z
d
determined in step 5 of section 7-2-3.
If the value of Z
d
for the coin is less than 6.6 mm then this action limit has passed.
If the value of Z
d
for the coin is more than or equal to 6.6 mm then this action limit has failed.
Mo/Mo - 19 x 23 paddle
Mo/Mo - Flexible 19 x 23 paddle
Rh/Rh - 19 x 23 paddle
Rh/Rh - Flexible 19 x 23 paddle
If any of these Action Limits are exceeded, the source of the problem must be identified, and corrective
actions must be taken. If necessary, call your OLC for help if any of these Action Limits are exceeded.
Edge
Z
d
Is the value of Z
d
less than 6.6 mm?
Posterior (chest wall)
Edge
Z
d
Is the value of Z
d
less than 6.6 mm?
Posterior (chest wall)
Edge
Z
d
Is the value of Z
d
less than 6.6 mm?
Posterior (chest wall)
Edge
Z
d
Is the value of Z
d
less than 6.6 mm?
Posterior (chest wall)
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