CHAP
. 15
GE Healthcare
Senographe 2000 D Acquisition System
REV 1
OM 5179217–1–100
166
D
The generator can supply a maximum of 100 W to the tube.
This example represents one 30 kV/200mAs exposure each minute.
1-1-6
Line Conditioner Resonance Frequency
D
20 kHz approx.
1-1-7
Generator Power (excluding tube)
D
5 kW maximum.
1-2
Maximum Tolerance of Displayed Constants
kV and mAs:
D
kV:
"
5%
D
mAs:
"
7.6%
"
1.1 mAs
Measurement Conditions:
D
kVp:
Connect an HV voltage divider (Machlett Dynalizer IIIA; ratio 10 kV/1 V) in series with the
x-ray tube and measure the voltage with a multimeter (Fluke 47)
D
mAs:
Connect an HV voltage divider (Machlett Dynalizer IIIA; ratio 10 kV/1 V) in series with the
x-ray tube. Connect a waveform analyzer (Tektronix 7854) to the output of the divider; the analyzer
receives a signal proportional to the voltage applied to the tube. The mAs values are given by:
mAs =
ŕ
T2
T1
i dt
Where T1 is the time at which the high voltage reaches 75% of its maximum value, and
T is the time at which the high voltage returns to 75% of the maximum value.
Compression Force and Breast Thickness:
D
Compression Force:
"
10 newton
D
Breast Thickness
"
10 mm
1-3
Workstation Storage
Total internal disk capacity: two disks, each of 9 Gbytes.
Allocated for image storage: 14 Gbytes (corresponding to approximately 1650 images).
1-4
Digital Detector FOV
Field of View (FOV) of the Digital Detector: 19 cm x 23 cm.
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