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- Title
Radiation transmission data for radionuclides and materials relevant to brachytherapy facility shielding.
- Authors
Papagiannis, P.; Baltas, D.; Granero, D.; Pérez-Calatayud, J.; Gimeno, J.; Ballester, F.; Venselaar, J. L. M.
- Abstract
To address the limited availability of radiation shielding data for brachytherapy as well as some disparity in existing data, Monte Carlo simulation was used to generate radiation transmission data for 60Co, 137Cs, 198Au, 192Ir, 169Yb, 170Tm, 131Cs, 125I, and 103Pd photons through concrete, stainless steel, lead, as well as lead glass and baryte concrete. Results accounting for the oblique incidence of radiation to the barrier, spectral variation with barrier thickness, and broad beam conditions in a realistic geometry are compared to corresponding data in the literature in terms of the half value layer (HVL) and tenth value layer (TVL) indices. It is also shown that radiation shielding calculations using HVL or TVL values could overestimate or underestimate the barrier thickness required to achieve a certain reduction in radiation transmission. This questions the use of HVL or TVL indices instead of the actual transmission data. Therefore, a three-parameter model is fitted to results of this work to facilitate accurate and simple radiation shielding calculations.
- Subjects
RADIOISOTOPE brachytherapy; RADIOISOTOPE therapy; RADIATION shielding; MONTE Carlo method; RADIOTHERAPY; PHOTONS
- Publication
Medical Physics, 2008, Vol 35, Issue 11, p4898
- ISSN
0094-2405
- Publication type
Article
- DOI
10.1118/1.2986153