Gendex GX CB-500 - Scatter Measurements for 23 Second Scans

15-7
Radiation Environment Survey
G990710 30 June 2008
Scatter Measurements for 23 Second Scans
23.0 second scan using pulsed X-ray: 619 frames, 19 ms pulse width at 5 mA.
Based on this, the estimated workload is:
10 scans per week yielding a workload of 9.6 mA-min/week
25 scans per week yielding a workload of 23.8 mA-min/week
50 scans per week yielding a workload of 55.6 mA-min/week
Standard (full-beam) Diameter 8.5 - Height 8.5 cm
NOTE: Selectable voxel sizes are 0.25, 0.2 and 0.125.
Location
Distance in
Feet
[meter]
Exposure
(mR)
Exposure
(μR)
Exposure
μR/mAs
10
scans/wk
mR/wk
25
scans/wk
mR/wk
50
scans/wk
mR/wk
0
o
3 [0.91m] 0.69 689.1 12.08 6.9 17.2 34.5
6 [1.82m] 0.17 165.3 2.90 1.7 4.1 8.3
9 [2.74m] 0.08 76.5 1.34 0.8 1.9 3.8
45
o
3 [0.91m] 0.70 699.1 12.26 7.0 17.5 35.0
6 [1.82m] 0.16 163.1 2.86 1.6 4.1 8.2
9 [2.74m] 0.08 75.3 1.32 0.8 1.9 3.8
90
o
3 [0.91m] 0.50 502.6 8.81 5.0 12.6 25.1
6 [1.82m] 0.13 127.4 2.23 1.3 3.2 6.4
9 [2.74m] 0.06 58.9 1.03 0.6 1.5 2.9
135
o
3 [0.91m] 0.11 108.4 1.90 1.1 2.7 5.4
6 [1.82m] 0.03 32.9 0.58 0.3 0.8 1.6
9 [2.74m] 0.02 16.4 0.29 0.2 0.4 0.8
180
o
3 [0.91m] 0.10 100.0 1.75 1.0 2.5 5.0
6 [1.82m] 0.03 31.5 0.55 0.3 0.8 1.6
9 [2.74m] 0.01 13.6 0.24 0.1 0.3 0.7
225
o
3 [0.91m] 0.10 103.0 1.81 1.0 2.6 5.1
6 [1.82m] 0.03 30.2 0.53 0.3 0.8 1.5
9 [2.74m] 0.02 16.4 0.29 0.2 0.4 0.8
270
o
3 [0.91m] 0.52 516.2 9.05 5.2 12.9 25.8
6 [1.82m] 0.13 126.4 2.22 1.3 3.2 6.3
9 [2.74m] 0.06 59.1 1.04 0.6 1.5 3.0
315
o
3 [0.91m] 0.64 639.0 11.20 6.4 16.0 32.0
6 [1.82m] 0.16 156.3 2.74 1.6 3.9 7.8
9 [2.74m] 0.07 72.7 1.27 0.7 1.8 3.6
3 Feet above
0.08 75.5 1.32 0.8 1.9 3.8
3 Feet above + 3 Outward
0.25 248.0 4.35 2.5 6.2 12.4