A-4 P/N 9-500-0255
Service Manual
Appendix A: Specifications
System Specifications
Automatic Decompression Moves the compression device a distance of
10 cm +
1.0 cm and is limited to 3.0 +1.0 sec-
onds of travel duration when the available
travel is less than 10 cm.
Compression Force Display LED on Compression Device Cover shows the
compression force in increments of 4.5 N (1
lb), rounded to the nearest integer.
Back Drive After Compression Does not exceed 1.5 mm in either motorized
or manual drive modes between -90°, 0, and
+90°, and no greater than 3.0 mm at all other
positions.
C-arm Movement C-arm movement is locked out when greater
than 50 N (12 lb) of compression force is
applied.
Compression Thickness Measurement and Display
Thickness is measured between 0 and 15 cm
above the breast support. The system compen-
sates for the type of Image Receptor installed.
The compression display is angled and visible
from both sides of patient.
Comp. Thickness Accuracy ±0.5 cm between 0.5 cm and 15 cm at 132 N
(30 lb) compression force. The measurement is
reproducible within +
2.0 mm of the displayed
value. Compression thickness is displayed on
the compression device and is angled and visi-
ble from both sides of patient.
1.7 Compression Paddles
Compression Paddles The compression paddles are transparent and
the full field paddles are marked with the loca-
tion of the AEC sensor positions. These mark-
ings are not detectable on film when imaged
with 1.0 cm of acrylic attenuator at 22 kV to
an optical density of 1.2 OD. The paddle
attenuation is less than 20% (reduction of mR/
mAs) at 28 kV. The full field paddles are
adjustable to provide focal spot, compression
device and image receptor alignment require-
ments.
The compression paddles including the frame
and compression device maintain a parallel
compression and do not deflect by more than
1.0 cm difference from any surface providing
compression under maximum motorized com-
pression force (except for F.A.S.T. paddles).
Compression Paddle Sizes Available paddles:
18 x 24 cm Full Field Contact
24 x 30 cm Full Field Contact
7.5 cm Spot Contact/Magnification
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