GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A028 - Collimation Checks
Page no. 683 Chapter 7
JC-ELE-A-028.fm
7. Make a manual exposure using the following parameters:
• track/filter combination: either Mo/Mo or Rh/Rh
• 30 kVp
• 250 mAs
8. Perform the measurements described in section 7-2-1 and section 7-2-2. Then determine if the
Action Limits 1 and 2 have passed, as described in section 7-3, Action Limit on page 690.
7-1-2 Compression Paddle Chest Wall Test
Both the Mo and Rh X-ray sources must be tested. Perform the steps 1 through 4 for the following pad-
dles:
• 19 x 23 paddle
• Flexible 19 x 23 paddle (if present with the system)
1. Tape the coin to the underside of the compression paddle as illustrated below. The coin must be as
close as possible to the tangent of the inner, vertical surface of the compression paddle at the chest
wall edge. Position the coin near the center of the chest wall edge.
2. Place the Radiation Protection Plate on the surface of the Bucky. Each side of the Radiation Protec-
tion Plate must extend about 4 cm beyond each edge of the light field.
CAUTION
The X-ray doses used in this procedure can saturate the image receptor if the Radiation
Protection Plate is not used and not correctly positioned. If the Radiation Protection Plate
does not completely cover the field of view, a ghost image may be imposed on the digital
image receptor at the edge of the Radiation Protection Plate. Ensure that the entire field of
view of the light field is covered by the Radiation Protection Plate.
3. Insert the compression paddle and position it approximately 4.2 cm from the Breast Support.
4. Make a manual exposure using the following parameters:
• track/filter combination: either Mo/Mo or Rh/Rh
• 30 kVp
• 250 mAs
5. Perform the measurements described in section 7-2-3 . Then determine if the Action Limit 3 has
passed, as described in section 7-3, Action Limit on page 690.
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