使用当前版本的MCNP蒙特卡罗模拟改进径向剂量函数估计：6711型和ISC3500型125I近距离放射治疗源

Improved radial dose function estimation using current version MCNP Monte-Carlo simulation: Model 6711 and ISC3500 125I brachytherapy sources.

作者信息

Duggan Dennis M

机构信息

Vanderbilt Center for Radiation Oncology, Vanderbilt University, B-1003 TVC, Nashville, TN 5671, USA.

出版信息

Appl Radiat Isot. 2004 Dec;61(6):1443-50. doi: 10.1016/j.apradiso.2004.05.070.

DOI:10.1016/j.apradiso.2004.05.070

PMID:15388146

Abstract

Improved cross-sections in a new version of the Monte-Carlo N-particle (MCNP) code may eliminate discrepancies between radial dose functions (as defined by American Association of Physicists in Medicine Task Group 43) derived from Monte-Carlo simulations of low-energy photon-emitting brachytherapy sources and those from measurements on the same sources with thermoluminescent dosimeters. This is demonstrated for two 125I brachytherapy seed models, the Implant Sciences Model ISC3500 (I-Plant) and the Amersham Health Model 6711, by simulating their radial dose functions with two versions of MCNP, 4c2 and 5.

摘要

新版蒙特卡罗N粒子输运程序（MCNP）中改进的截面，可能会消除低能光子发射近距离放射治疗源的蒙特卡罗模拟所推导的径向剂量函数（如医学物理师协会任务组43所定义）与使用热释光剂量计对相同源进行测量所得到的径向剂量函数之间的差异。针对两种¹²⁵I近距离放射治疗籽源模型，即植入科学公司的ISC3500模型（I-Plant）和安进医疗公司的6711模型，通过使用MCNP的两个版本（4c2和5）模拟它们的径向剂量函数，验证了这一点。