P/N 9-500-0255 A-3
Service Manual
Appendix A: Specifications
System Specifications
1.5 C-arm Specifications
C-arm Rotation Manual; ccw (+) 195° to 205°, cw (-) 145° to
155°; detents at every 45°
Rotation lock Electromagnetic, fail-safe
Vertical Travel (minimum) 71 to 140 cm (28 to 55 inches) from Bucky
surface to floor for C-arm at 0°
Alignment—Focal Spot, Compression Device and Image Receptor
The focal spot of the x-ray tube is located such
that the ray falling on the edge of the image
receptor closest to the chest wall is perpendic-
ular to the image receptor. The system allows
the plane formed by the focal spot and the
chest wall of the device to be perpendicular to
that ray, and the motion of the compression
device provides essentially parallel compres-
sion of the breast with respect to the plane of
the image receptor.
Source to Image Distance (SID) 64.6 cm ±0.5 cm from the nominal position of
the large focal spot to the image receptor (film)
located in the Bucky
1.6 Compression Specifications
Manual Compression Force Limited to a maximum 300 N, +0/-88 N (67.4
lb, +0/-20 lb) between -150° through 0° to
+150° of C-arm rotation. It is not less than 150
N (33.7 lb) at all other angles.
Motorized Compression Force User Selectable for either Full or Pre Compres-
sion modes in User Defaults. 66 N to 178 N
(15 lb to 40 lb), user-selected within this range.
Factory default of 132 N (30 lb).
Full Compression User adjustable with a nominal range of 111 N
minimum to 178 N maximum (25 lb minimum
to 40 lb maximum)
Pre Compression User adjustable with a nominal range of 66 N
minimum to 132 N maximum (15lbs mini-
mum to 30 lbs maximum).
Motorized Compression Motorized Up/Down controls on both sides of
the C-arm and on the dual function footswitch.
Manual Release Manual Up/Down handwheel controls on
both sides of the Compression Device.
Compression Release Motorized release controlled by push buttons
on both sides of the C-arm and on the Control
Panel. Automatic release of the compression
device can be enabled by the user through
software, which releases the compression
device at the end of the x-ray exposure. All
compression release functions are disabled
when a localization paddle is installed.
Release is motor driven.
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