GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card ELE A015 - Gantry Functional Checks
Page no. 581
Chapter 7
JC-ELE-A-015.fm
Perform this check at least three times for each button.
6-5
Check Light Centering Device
Press one of the light centering device activation buttons.; check that the device lights for 30 seconds.
6-6
Check Format Control
Check that repeated presses on each of the two format control push buttons give the sequence:
1) light centering device lights; 2) first format reduction; 3) second format reduction; 4) full format.
6-7
Check Magnification Sensors
1. With the magnification device removed, the Gantry readout must show a magnification of 1.0.
2. Install the two magnification stands in turn. The Gantry readout must show magnifications of 1.5 and
1.8, according to the device installed.
6-8
Check Paddle Compression
1. Check that both sets of compression/decompression pedals and the manual compression knobs
located on the paddle holder all function correctly. That is, the paddle moves up or down in response
to each command.
2. Use the Mammography Compression Scale placed between the Bucky and the compression paddle
to check calibration of the compression force display on the Gantry readout. Measure one point at
5 daN and one point at 15 daN. The value on the Gantry readout must agree within ±1 daN. If it does
not, perform
Job Card CAL A048 - Calibration of Compression Force Sensor
If the recommended compression measurement tool is not available, this verification can be done as
follows:
-
Lowering the paddle close to the top surface of the Bucky
-
Install the magnification device.
-
Connect a spring dynamometer (calibrated from 0 kg to 15 kg) between the compression paddle
and the magnification device.
6-9
Check Breast Thickness Measurement
1. Install the Bucky and place the corner of a 10 mm thick acrylic plate. The plate must be positioned at
45°, entering about 80 mm from the chest wall.
2. Lower the compression paddle into contact with the acrylic plate.
3. Slowly increase compression force on the acrylic plate while watching the breast thickness display on
the Gantry readout. The displayed value must remain in the range 10 mm ±2 mm for any value of
Operation
Button
Tube Head Keypad
Arm Keypad
Left
Right
Left
Right
Slow rotation to the left
4 (light press)
Fast rotation to the left
4 (firm press)
Slow rotation to the right
4 (light press)
Fast rotation to the right
4 (firm press)
Slow lift upwards
5 (light press)
Fast lift upwards
5 (firm press)
Slow lift downwards
5 (light press)
Fast lift downwards
5 (firm press)
