Filters - GE SENOGRAPHE DMR+ Technical Publications

GE Medical Systems
REV1
2–2

Filters

Note:
Note:
TRACK
FOCAL SPOT
Large
Small
The filters are installed on a disk driven by a stepping motor which moves from one filter to
the other.
Three different filters are supplied:
D
Molybdenum: 0.03 mm,
D
Rhodium: 0.025 mm,
D
Aluminum: 1 mm.
The Column electronics control the filters according to operator requirements in
1-point or 2-point mode, or to software requirements in 0-point mode.
TARGET VOLTAGE
Molybdenum
Rhodium
The minimum filtration permanently installed in the useful beam of the X–ray tube is 0.008
mm Al equivalent (8 micrometers Al) at 30 kV (corresponding to 0.69 mm of Beryllium).
Fixed Layers of Material in the X–Ray Beam incident to the Patient.
The values obtained at 30 kV are given in the table below:
Fixed Layers of Material in the X-Ray Beam
incident to the patient
- Compression Plate
- Magnification Plate
- Bucky Support Plate
Mo
100 mA max. 75 mA max.
40 mA max. 40 mA max.
FILTER
(kV)
30 0.03 Mo
30 0.025 Rh
49 1 Al
30 0.025 Rh
49 1 Al
4-8
SENOGRAPHE DMR+
om 5128689-2-100
Rh
EQUIVALENCE
(half value layer)
0.3 mm Al minimum
0.35 mm Al minimum
0.6 mm Al minimum
0.4 mm Al minimum
0.6 mm Al minimum
EQUIVALENCE
at 30 kV
0.16 mm Al
0.22 mm Al
0.13 mm Al