Chapter 17 Page no. 202 17-specs.fm
GE Healthcare Senographe DS Acquisition System
Revision 1 Operator Manual 5307907-3-S-1EN
Specifications
2-7 Filters and anode tracks
Maximum current for each track/focal spot configuration:
The minimum filtration permanently installed in the useful beam of the X-ray tube is 0.008 mm aluminum
equivalent (8 µm aluminum equivalent) at 30 kV corresponding to the minimum thickness of beryllium of
the x-ray tube output window.
The switched filters are installed on a disk driven by a stepping motor which moves from one filter to the
other. Two different filters are supplied:
• Molybdenum: 0.03 mm,
• Rhodium: 0.025 mm,
Note:
The system electronics control the filters according to operator requirements in Manual mode, or
to software requirements in AOP mode
2-8 Attenuation equivalence
Attenuation equivalence for components in the X-ray beam (in accordance with FDA HHS 21 CFR,
§ 1020.30; measurements made at a potential of 100 kVp, using an X-ray beam with an HVL of 2.7 mm
of aluminum)
2-9 Main characteristics of the grid
• Type: linear
• Number of lines: 31 line pairs/cm.
• Grid ratio: R 5 : 1.
• Focal length: F0 = 650 mm
Track
Focal spot Mo Rh
Large 100 mA max. 62 mA max.
Small 40 mA max. 35 mA max.
TARGET VOLTAGE
(kV)
FILTER EQUIVALENCE
(half-value layer)
Molybdenum 30 0.03 Mo 0.3 mm Al minimum
Molybdenum 30 0.025 Rh 0.35 mm Al minimum
Rhodium 30 0.025 Rh 0.4 mm Al minimum
Component Al equivalence (mm)
Magnification stand (1.5 and 1.8) less than 0.35
Image receptor support less than 0.2
Bucky cover less than 0.2
Stereotix positioner less than 0.3
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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