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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1 st principle extensions to <strong>NCRP</strong> 49<br />
• Then iteratively find a barrier thickness x that<br />
decreases that kerma to P/T, the design goal<br />
modified by the occupancy factor<br />
K )<br />
(<br />
x<br />
) =<br />
∑ ∑ ( K<br />
(<br />
x<br />
)<br />
+<br />
K<br />
(<br />
x<br />
)<br />
+<br />
K<br />
(<br />
x<br />
)<br />
=<br />
= P<br />
S<br />
L<br />
tubes kVp<br />
• See http://www.geocities.com/djsimpkin/ for<br />
shareware program XRAYBARR to do this<br />
P<br />
T<br />
8
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