GE Healthcare Senographe DS Acquisition System
Revision 1 Operator Manual 5307907-3-S-1EN
Maintenance
15-maint.fm Page no. 161 Chapter 15
3 Test for flexible paddle deflection in compression
3-1 Objective
To ensure that the flexible compression paddle is capable of applying effective compression to the
breast.
3-2 Frequency
This test should be performed annually or when a loss in performance is suspected.
3-3 Test object
The test object is based on estimates of the average size of a compressed breast.1,2 Refer to GE MQSA
Compliance Guide 2233373-100 for information on the calculations used to determine its dimensions.
The suggested test object is shown here:
- The basic shape is a right circular semi-cylinder extended by
a rectangular box.
- Its dimensions are:
r = 9 cm
h = 1 cm
w = 18 cm
- See below for information on the thickness and suggested
material of the test object.
• The thickness of the test object is not critical, but values in the range of 3 to 5 cm are recommended.
Since the purpose of the test objects is to evaluate the parallelism between the compression paddle
and the breast support surface, the parallelism of the upper and lower surfaces of the test objects is
critical. Consistency of the thickness within ± 0.5 mm is recommended.
• It is intended that the test object be made of a compressible, foam material. One foam material that
has been used in a similar application is type T-200, Minicel foam produced by the Voltek division of
Sekisui America Corporation. This foam has been selected for use in the "Tissue Mimicking Com-
pression Test Tool," Model BC200, sold by Standard Imaging, Middleton, WI, in part because it
behaves similarly to breast tissue during compression.
3
r
h
w
FOR TRAINING PURPOSES ONLY!
NOTE: Once downloaded, this document is UNCONTROLLED, and therefore may not be the latest revision. Always confirm revision status against a validated source (ie CDL).
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