Imaging Sciences i-Cat 17-19 - Scatter Measurements for 26.9 Second Scan; Diameter 16 Cm 26.9 Second Scan

17-19 Operators’ Manual
990400 Rev C 2010 May 1
13-4
Scatter Measurements for 26.9 Second Scan
26.9 second scan using pulsed X-ray: 619 frames, 12 ms pulse width at 5 mA taken
in Diameter16cm scanning mode. Based 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 61.0 mA-min/week
Diameter 16cm 26.9 Second Scan
Location
Distance in
Feet
[meter]
Exposure
(mR)
Exposure
(R)
Exposure
mR/mAs
10
scans/wk
mR/wk
25
scans/wk
mR/wk
50
scans/wk
mR/wk
0
o
3 [0.91m] 0.66 664.2 0.018 6.64 16.61 33.21
6 [1.82m] 0.17 173.4 0.005 1.73 4.34 8.67
9 [2.74m] 0.08 80.8 0.002 0.81 2.02 4.04
45
o
3 [0.91m] 0.70 695.4 0.019 6.95 17.39 34.77
6 [1.82m] 0.18 183.0 0.005 1.83 4.58 9.15
9 [2.74m] 0.09 85.0 0.002 0.85 2.13 4.25
90
o
3 [0.91m] 0.72 718.2 0.019 7.18 17.96 35.91
6 [1.82m] 0.17 172.4 0.005 1.72 4.31 8.62
9 [2.74m] 0.07 72.6 0.002 0.73 1.82 3.63
135
o
3 [0.91m] 0.16 162.8 0.004 1.63 4.07 8.14
6 [1.82m] 0.04 43.2 0.002 0.43 1.08 2.16
9 [2.74m] 0.02 21.6 0.001 0.22 0.54 1.08
180
o
3 [0.91m] 0.18 177.6 0.005 1.78 4.44 8.88
6 [1.82m] 0.05 49.2 0.001 0.49 1.23 2.46
9 [2.74m] 0.02 21.8 0.001 0.22 0.55 1.09
225
o
3 [0.91m] 0.17 168.0 0.005 1.68 4.20 8.40
6 [1.82m] 0.05 46.4 0.001 0.46 1.16 2.32
9 [2.74m] 0.02 19.6 0.001 0.20 0.49 0.98
270
o
3 [0.91m] 0.61 613.2 0.017 6.13 15.33 30.66
6 [1.82m] 0.16 158.4 0.004 1.58 3.96 7.92
9 [2.74m] 0.07 69.6 0.002 0.70 1.74 3.48
315
o
3 [0.91m] 0.73 725.0 0.020 7.25 18.13 36.25
6 [1.82m] 0.19 191.2 0.005 1.91 4.78 9.56
9 [2.74m] 0.08 84.8 0.002 0.85 2.12 4.24
3 Feet above
0.10 98.4 0.003 0.98 2.46 4.92
3 Feet above + 3 Outward
0.24 240.4 0.006 2.40 6.01 12.02