Hologic Selenia - Page 129

Selenia User Guide
Appendix A—System Specifications
MAN-03270 Revision 003 117
Compression Down Motion Variable Speed
Service Selectable between approximately 10% through 100%
of full speed.
Compression Force Display
Two LED Displays on the Compression Device show the
compression force through the range of 10 lb to 67.4 lb (44.5 N
to 300 N) in 1 lb (4.4 N) increments.
Compression Force Display Accuracy
±4.5 lb (±20 N)
Compression Thickness Display
Two LED Displays on Compression Device measures between 0
and 15 cm above image receptor in 0.1 cm increments. The
display is visible from both sides of the patient.
Compression Thickness Accuracy
±0.5 cm for thicknesses between 0.5 cm and 15 cm
Compression Paddles
Compression paddles are transparent. The paddles are
composed of polycarbonate. The paddles provide a parallel plane
to the image receptor and do not deflect by more than 1 cm
difference from any surface providing compression under 25 lb
(111.1 N) of compression force (except for F.A.S.T. paddles.).
The paddles are adjustable to provide the focal spot,
compression device and image receptor alignment requirement.
A.6.3 X-ray Tube: Molybdenum
Focal Spot (NEMA / IEC)
Large (0.3 mm) Nominal
Small (0.1 mm) Nominal
Tube Voltage
20 kV to 39 kV
Tube Current
Large Focal Spot = 100 mA between 25 and 32 kV
Small Focal Spot = 30 mA between 25 and 32 kV
Anode Rotation
180 Hz (9600 RPM minimum)
Anode Angle
Bi-angular: Large focal spot at 16°, Small focal spot at 10°.
X-ray tube angle at 6° to provide 22° (Large FS) and 16° (Small
FS) anode to Image Receptor plane angle.
Anode Material
Molybdenum
X-ray Window
Beryllium 0.8 mm thickness (maximum)
A.6.3.1 X-ray Tube Housing
Over Temperature Protection Sensor
Internally connected in series with the stator common lead.
Maximum Temperature, Tube Housing
Surface
55 °C (151° F)
Maximum Temperature, Tube Head Cover
Surface
41 °C (105.8° F)
Safety Class
IEC 60601-1, Class I,IEC 60601-2-28