GE Senographe DS Manual page 690

GE Healthcare
Revision 1
Job Card ELE A028 - Collimation Checks
7-3 Action Limit
The results from the Mo/Mo and Rh/Rh tests above must adhere to the following three action limits:
1. Congruence of the light field with the X-ray field must be such that the total misalignment (sum of
misalignments on opposite sides) is within 2% of the SID. As required by 21 CFR chapter I, Subchap-
ter J, 1020.31(d)(2)(i).
Enter measured deviations between the X-ray field and light field on the data form as follows (i.e. Y
for each XR-M film strip determined in step
positions):
If both | Y A| + |Y
d
If either | Y A| + |Y
d
failed.
Note:
If either | Y A| + |Y
d
the position of the Collimator Lamp according to
then re-perform the Collimator Checks.
Mo/Mo
- The magnitudes of deviations at the left edge and right edge (ignoring + or – signs) are entered
on the data form and added together.
Film
A
D
- Similarly, the deviations at the anterior and posterior (chest wall) edges are entered (without
regard to sign) and the magnitudes added together.
Film
B
C
Rh/Rh
- The magnitudes of deviations at the left edge and right edge (ignoring + or – signs) are entered
on the data form and added together.
Film
A
D
- Similarly, the deviations at the anterior and posterior (chest wall) edges are entered (without
regard to sign) and the magnitudes added together.
Film
B
C
Chapter 7
D| and | Y B| + |Y C| are less than 13.2 mm then this action limit has passed.
d d d
D| or | Y B| + |Y C| is more than or equal to 13.2 mm then this action limit has
d d d
D| or | Y B| + |Y
d d
Edge
Left
Right
Edge
Anterior
Posterior (chest wall)
Edge
Left
Right
Edge
Anterior
Posterior (chest wall)
Service Information and Procedures Class A 2385072-16-8EN
1 of section 7-2-2) (see illustration 1 on
C| is more than or equal to 10 mm, it is recommended to adjust
d
Adjusting a Newly Installed Lamp on page
Y | Y A| + |Y
f f
Y | Y B| + |Y
f f
Y | Y A| + |Y
f f
Y | Y B| + |Y
f f
Page no. 690
page 681
D| Is | Y A| + |Y
f f
than 13.2 mm?
C| Is | Y B| + |Y
f f
than 13.2 mm?
D| Is | Y A| + |Y
f f
than 13.2 mm?
C| Is | Y B| + |Y
f f
than 13.2 mm?
Senographe DS
f
for film
1388,
D| less
f
C| less
f
D| less
f
C| less
f
JC-ELE-A-028.fm