GE Senographe DS Operator's Manual page 163

GE Healthcare
Revision 1
3-6 Procedure
1. Place the support plate directly on the image receptor support device so as to completely cover the
breast support surface.
Note:
The support plate must be parallel to the breast support surface of the Bucky. Ensure that the sup-
port plate is not resting on any corner reinforcements or other raised edges on the top of the Bucky.
If the support plate is placed on top of the force scale, ensure that the top surface of the support
plate remains parallel to the breast support surface of the Bucky. The distance between the breast
support surface of the Bucky and the top surface of the support plate should be constant within 1
mm around the periphery of the Bucky.
2. Place the test object on the support plate as shown below with the cylindrical axis of the test object
aligned along the X-ray beam. Align the straight edge of the test object with the chest wall edge of the
compression paddle. Center the test object left-to-right.
3. Apply a compression force of 11 to 12 daN (25 to 27 lb.).
4. Use the telescoping gauge to locate the lowest corner of the compression paddle (closest to the sup-
port plate) as shown in the illustration below. Use the set screw on the telescoping gauge to lock the
gauge pin in position at the measured distance.
Note:
If the pin on the telescoping gauge is fully extended yet the gauge is shorter than the smallest dis-
tance between the support plate and the compression paddle, use the gauge blocks to extend the
reach of the telescoping gauge.
5. Stack the telescoping gauge on a thickness of gauge blocks to test for the12 mm to 14 mm deflection
limit specified for the flexible paddle. Test each corner of the compression paddle to determine if the
combination of the telescoping gauge plus the gauge block(s) can fit between the compression pad-
dle and the support plate.
compression paddle
telescoping gauge stacked
on 12-14 mm gauge block
support plate
Bucky
15-maint.fm
test object, compression applied
Bucky
Page no. 163
Senographe DS Acquisition System
Operator Manual 5307907-3-S-1EN
support plate
compression paddle
test object
telescoping gauge at lowest
corner
Maintenance
Chapter 15