Neutron shielding verification measurements and simulations for a 235-MeV proton therapy center

被引:38
作者
Newhauser, WD
Titt, U
Dexheimer, D
Yan, X
Nill, S
机构
[1] Massachusetts Gen Hosp, Boston, MA 02114 USA
[2] Bechtel Corp, San Francisco, CA USA
[3] Harvard Cyclotron Univ, Cambridge, MA USA
[4] Deutsch Krebsforschungszentrum, D-6900 Heidelberg, Germany
关键词
neutron shielding; proton therapy; Monte Carlo simulations;
D O I
10.1016/S0168-9002(01)01400-0
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The neutron shielding at the Massachusetts General Hospital's 235-MeV proton therapy facility was investigated with measurements, analytical calculations, and realistic three-dimensional Monte Carlo simulations. In 37 of 40 cases studied, the analytical calculations predicted higher neutron dose equivalent rates outside the shielding than the measured, typically by more than a factor of 10, and in some cases more than 100. Monte Carlo predictions of dose equivalent at three locations are, on average, 1.1 times the measured values. Except at one location, all of the analytical model predictions and Monte Carlo simulations overestimate neutron dose equivalent. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:80 / 84
页数:5
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