Chapter 9 Page no. 1722
JC-CAL-A-050.fm
GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card CAL A050 - Compression Thickness Calibration
6-2 Check the Thickness Measurement in Contact Mode
Note:
If you are re-calibrating a Compression board that already contains calibration information (e.g.
you are performing a re-calibration of an existing Compression board) then you can directly follow
the verification steps below.
If you are calibrating a Compression board that does not contain calibration information (e.g. you
have changed the Compression board, or have updated the software on the Compression board)
then you must perform Compression Force Calibration on page 1709 in Job Card CAL A048 - Cal-
ibration of Compression Force Sensor before you follow the verification steps below, otherwise you
will witness a compression-related error.
1. Place the Standard Compression Paddle.
2. Still in contact mode, place the corner of a
40 mm thick acrylic plate (1).The plate must be
positioned at 45°, entering about 80 mm from
the chest wall.
3. Lower the compression paddle into contact with
the acrylic.
4. Verify for any compression force between zero
and 20 daN of compression (as displayed on
the Gantry readout), that the breast thickness
displayed on the Gantry readout is equal to 40
mm +/- 2 mm.
1
80 mm +/- 5mm
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