Bmd Precision; Duty Cycle; Leakage Technique Factors; Minimum Beam Filtration - Hologic QDR 4500 Technical Manual

BMD Precision:

EXAM
AP Spine Array
AP Spine Fast
AP Spine High Definition
AP Spine Turbo
Forearm
Hip Array
Hip Fast
Hip High Definition
Hip Turbo
Lateral Spine Array
Lateral Spine Fast
Lateral Spine High Def.
Whole Body

Duty Cycle:

50% for all scan modes except Whole Body
A
100% for Whole Body scans
SL,W,C 50% for all Scan Modes

Leakage Technique Factors

The leakage technique factors for all models of QDR 4500's are the same. It is the maximum
continuous current at the maximum peak potential. This is X-ray mode #3. Peak potential
140/100kVp. (dual energy), current 10mA peak 25% duty cycle or 2.5mA average.

Minimum Beam Filtration

The minimum filtration permanently in the beam is 3.7mm Al equivalent @80kV.
1-10
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QDR 4500 Technical Manual
SCAN TIME
MODEL (seconds)
All 60
All 30
A,SL 120
A,SL 10
W,C 15
A,SL 30
W,C 30
All 60
All 30
A,SL 120
A,SL 10
W,C 15
A,SL 240
A,SL 120
A,SL 240
A 180
W 407
in vivo PRECISION
1.0%
1.5%
1.0%
2.0%
2.0%
1.0%
1.0%
1.0%
1.5%
1.0%
2.0%
2.0%
1.0%
1.0%
1.0%
1.0%
1.0%
DOSE
mGy mrad
0.20 20.0
0.10 10.0
0.20 20.0
0.07 7.0
0.05 5.0
0.05 5.0
0.10 10.0
0.20 20.0
0.10 10.0
0.20 20.0
0.07 7.0
0.05 5.0
0.70 70.0
0.35 35.0
0.70 70.0
0.01 1.0
0.015 1.5