KaVo 3D eXam - Scatter Measurements for 26.9 Second Scan; Landscape 26.9 Second Scan

K990400 16 April 2008
Radiation Environment Survey
12-5
Scatter Measurements for 26.9 Second Scan
26.9 second scan using pulsed X-ray: 619 frames, 12 ms pulse width at 5 mA. Base
on this, the Estimated workload is:
10 scans per week yielding a workload of 6.2 mA-min/week
25 scans per week yielding a workload of 15.5 mA-min/week
50 scans per week yielding a workload of 31.0 mA-min/week
Landscape 26.9 Second Scan
Location
Distance in
Feet
[meter]
Exposure
mR
Exposure
(μR)
10
scans/wk
mR/wk
25
scans/wk
mR/wk
50
scans/wk
mR/wk
0
o
(A)
3 [0.91m] 0.61 609 6.1 15.2 30.5
6 [1.82m] 0.15 154.4 1.5 3.9 7.7
9 [2.74m] 0.07 71 0.7 1.8 3.6
45
o
3 [0.91m] 0.63 629.2 6.3 15.7 31.5
6 [1.82m] 0.16 162.8 1.6 4.1 8.1
9 [2.74m] 0.07 72.6 0.7 1.8 3.6
90
o
(B)
3 [0.91m] 0.58 578.2 5.8 14.5 28.9
6 [1.82m] 0.15 146.6 1.5 3.7 7.3
9 [2.74m] 0.07 65.8 0.7 1.6 3.3
135
o
3 [0.91m] 0.49 486.2 4.9 12.2 24.3
6 [1.82m] 0.13 127.4 1.3 3.2 6.4
9 [2.74m] 0.06 57.4 0.6 1.4 2.9
180
o
(C)
3 [0.91m] 0.55 545 5.5 13.6 27.3
6 [1.82m] 0.13 128.6 1.3 3.2 6.4
9 [2.74m] 0.06 58.8 0.6 1.5 2.9
225
o
3 [0.91m] 0.51 513.2 5.1 12.8 25.7
6 [1.82m] 0.13 127.2 1.3 3.2 6.4
9 [2.74m] 0.06 58.8 0.6 1.5 2.9
270
o
(D)
3 [0.91m] 0.6 602.2 6.0 15.1 30.1
6 [1.82m] 0.15 146.4 1.5 3.7 7.3
9 [2.74m] 0.06 63 0.6 1.6 3.2
315
o
3 [0.91m] 0.64 640.6 6.4 16.0 32.0
6 [1.82m] 0.16 160.2 1.6 4.0 8.0
9 [2.74m] 0.07 73.8 0.7 1.8 3.7
1 meter above 0.07
69.6 0.7 1.7 3.5
1 meter above +1 Outward
0.17
169.2 1.7 4.2 8.5