Compression System - Siemens MAMMOMAT Maintenance Instruction

4 Compression System

SIM Testing the manual movement
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System OFF
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Move compression plate attachment Up/Down it must move free and without friction and noise
SIM Testing compression plate support
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Check that levers and retain pins are not damaged and release normally.
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Check for fixation of each compression plate
SIM Testing lexan of compression plates for wear and tear
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Check each plate for possible damage that can result harmful to patients.
SIM Check foot pedal switches functionality
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Check for each pedal switch functionality
SIM Testing magnification support fixation
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Check that the magnification plateform can be fixed at 1,5x and 2x
SIM Testing the "Compression" force
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Use shifted compression plate, position a bathroom balance on the top of the table and tennis ball,
select maximum compression force and check it.
SIM Testing the "Decompression" force
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Move compression plate up and check that force to stop it by hand is very light.
PMF Compression Thickness Display
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With large focus selected and compression plate in place check for compression thickness
indication using Plexiglas phantom blocks to simulate breast thickness.
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Repeat with small focus and magnification plateform + compression plate
If thickness value is not correct refer to service instructions SPB7-115.840.01..., chapter of dosimeter
where source to skin distance calibration is described.
Breast thickness is obtained by such value subtracted by F.F.D.
MAMMOMAT Balance
Maintenance Instructions
SPB7-115.831.01 Page 11 of 22
Rev.01 05.04
4 Compression System
Siemens AG
Medical Solutions