Optimal radiation shielding for beta and bremsstrahlung radiation emitted by 89Sr and 90Y: Validation by empirical approach and Monte Carlo simulations

Taisuke Murata, Kenta Miwa, Fumiyasu Matsubayashi, Kei Wagatsuma, Kenta Akimoto, Toshioh Fujibuchi, Noriaki Miyaji, Tomohiro Takiguchi, Masayuki Sasaki, Mitsuru Koizumi

研究成果: ジャーナルへの寄稿学術誌査読

8 被引用数 (Scopus)

抄録

Objective: High-energy beta emitters such as Strontium-89 (89Sr) and Yttrium-90 (90Y) are becoming increasingly popular nuclear therapy sources in Japan for treating cancer. Various characteristics of materials must be considered when designing radiation protection device for high-energy beta emitters. We empirically measured and simulated dose equivalents of beta and bremsstrahlung radiation arising from 89Sr and 90Y radiation shielded with various materials and determined optimal shielding materials against these sources. Methods: The dose equivalents of 89Sr and 90Y determined experimentally using an ionization chamber survey meter were compared with those of Monte Carlo simulations. The relative dose equivalents of beta and bremsstrahlung radiation separately transmitted by changing the thickness of acrylic, aluminum, iron, lead and tungsten shielding materials were simulated. Results: Dose equivalents were consistent between the empirical measurements and the simulation to within ±5 %. Shielding ability was more effective in the order of tungsten, lead, iron, aluminum and acrylic against both 89Sr and 90Y. The amount of beta and bremsstrahlung radiation transmitted through tungsten and lead was relatively small. Although such high-density material generates much bremsstrahlung radiation, it absorbs the bremsstrahlung radiations. Conclusions: Tungsten was the optimal material for efficient shielding against 89Sr and 90Y radiation and preferable among operators. The present findings provide useful information about how to define an appropriate shielding strategy for high-energy beta emitters.

本文言語英語
ページ(範囲)617-622
ページ数6
ジャーナルAnnals of Nuclear Medicine
28
7
DOI
出版ステータス出版済み - 8月 2014

!!!All Science Journal Classification (ASJC) codes

  • 放射線学、核医学およびイメージング

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