Determination of dosimetric parameters for 125I seed source using MCNP5 and EGSnrc MC codes

CAO Zhen; RUAN Xichao; MENG Beidi; SHI Cuiyan

doi:10.11889/j.0253-3219.2014.hjs.37.020201

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Determination of dosimetric parameters for 125I seed source using MCNP5 and EGSnrc MC codes

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- Determination of dosimetric parameters for 125I seed source using MCNP5 and EGSnrc MC codes
- NUCLEAR TECHNIQUES Vol. 37, Issue 2, Article number: 020201(2014)
- 作者机构：
  
  1. 中国原子能科学研究院核数据测量与评价技术重点实验室,北京,102413
  2. 原子高科股份有限公司,北京,102413
- 作者简介：
- 基金信息：
- DOI：10.11889/j.0253-3219.2014.hjs.37.020201
  CLC：
- Published：19 February 2014
- 稿件说明：
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CAO Zhen, RUAN Xichao, MENG Beidi, et al. Determination of dosimetric parameters for 125I seed source using MCNP5 and EGSnrc MC codes[J]. Nuclear techniques, 2014, 37(2): 020201
DOI：

CAO Zhen, RUAN Xichao, MENG Beidi, et al. Determination of dosimetric parameters for 125I seed source using MCNP5 and EGSnrc MC codes[J]. Nuclear techniques, 2014, 37(2): 020201 DOI： 10.11889/j.0253-3219.2014.hjs.37.020201.

摘要

根据AAPM TG43U1的推荐，使用MCNP5与EGSnrc两种蒙特卡罗程序计算6711型125I种子源剂量计算参数，并将两者计算结果和AAPM推荐值比较，得到相对偏差结果如下：剂量率常数，MCNP5为0.62%，EGSnrc为2.07%；径向剂量函数，MNCP5为0.15%?5.12%，EGSnrc为0%?2.18%。两者计算结果均与推荐值符合得很好，而EGSnrc的计算结果更具优势。

Abstract

Background: Seed source has become a popular treatment option in the management of various tumors

particularly in the prostate. Purpose: The aim is to develop accurate and reliable dosimetric parameters that could be used to measure the dose delivered to organs at risk. Methods: Dosimetric parameters (dose rate constant

radial dose function and anisotropy function) of model 6711 125I seed source were calculated with MCNP5 and EGSnrc MC codes following AAPM TG43U1 recommendations. Results: The two results were compared with the relative data recommend by AAPM TG43U1

and the data were as follows: dose rate constant with MCNP5 was in agreement with 0.62%

while that with EGSnrc was 2.07%; radial dose function with MCNP5 was within 0.15%?5.12%

while that with EGSnrc was within 0%?2.48%. Conclusion: The results of two MC codes are in accordance with the recommendations. But that with EGSnrc MC code is better.Cited

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