摘要
使用点核积分方法计算6711型^(125)I籽粒源参数,根据美国医学物理学家协会(American Association of Physicists in Medicine,AAPM)TG-43U1号报告推荐的剂量参数计算公式,可以获得6711型^(125)I籽粒源各参数。与AAPM TG-43U1推荐值比较,剂量常数相差6.76%,径向剂量函数值(不包括0.1 cm、0.15 cm、0.25 cm)最大相差2.27%,最小相差0.02%;与MCNP5(A General N-Particle Transport Code,Version 5)方法计算结果比较,剂量常数相差6.19%,径向剂量函数值(不包括0.1 cm、0.15 cm、0.25 cm)最大相差6.65%,最小相差0.06%。结果与推荐值符合较好,证明点核积分能够应用于籽粒源剂量参数计算。
Background： The 125I brachytherapy source has become a popular treatment option in the treatment various tumors, in order to reduce the risk of surrounding normal tissue, it is important to know the dosimetric characteristics of seed source. Purpose： The aim is to develop a reliable and saving time method for calculating the dosimetric parameters of seed source. Methods： Dosimetric parameters （dose rate constant, radial dose function and anisotropy function） of the model number 6711 125I seed source are calculated with point-kernel method following American association of physicists in medicine （AAPM） TG-43U1 recommendations. Results： The result was compared with the relative data recommended by AAPM TG-43U1 and Monte-Carlo （M-C） method. Dose rate constant with AAPM was in agreement with 6.76%, and that with M-C is 6.19%; radial dose function （except 0.1 cm, 0.15 cm and 0.25 cm） with AAPM is within 0.02%-2.27%, and that with M-C is within 0.06%-6.65%. Conclusion： The point-kernel method can be applicable to calculate the dosimetric characteristics of seed sources.
出处
《核技术》
CAS
CSCD
北大核心
2017年第7期35-39,共5页
Nuclear Techniques
关键词
点核积分方法
剂量学参数
125Ⅰ籽粒源
Point-kemel integration method, Dosimetric parameters, 125Ⅰ seed source
