NCRP-147 Shielding Models 147 Shielding Models - Radiation ...
NCRP-147 Shielding Models 147 Shielding Models - Radiation ...
NCRP-147 Shielding Models 147 Shielding Models - Radiation ...
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Calculation of Primary Kerma<br />
• Same as model in <strong>NCRP</strong>-49 except<br />
– account for workload distribution in kVp<br />
– May account for image receptor shielding x pre<br />
• Primary kerma in occupied area is then<br />
K ( x )<br />
P<br />
1<br />
d 2<br />
P<br />
+ x pre<br />
=<br />
∑ K W ( kVp)<br />
U W ( kVp)<br />
B(<br />
x + x pre , kVp)<br />
kVp<br />
20