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 />
• The models for primary, scatter, and leakage in<br />
<strong>NCRP</strong>-<strong>147</strong> are extensions to what’s in <strong>NCRP</strong>-<br />
49 (1976):<br />
– x-ray tubes operating over ranges of potentials<br />
(“workload distribution”)<br />
– new model for image receptor attenuation<br />
– new model for leakage<br />
6