[1]张宏涛,于慧敏,郭利涛,等.不同活度125I粒子植入后不同时间肿瘤吸收剂量对比[J].介入放射学杂志,2016,(03):243-246.
 ZHANG Hong- tao,YU Hui- min,GUO Li- tao,et al.Comparison of tumor absorbed doses at different time after implantation of 125I seeds with different radioactivity [J].journal interventional radiology,2016,(03):243-246.
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不同活度125I粒子植入后不同时间肿瘤吸收剂量对比 ()

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《介入放射学杂志》[ISSN:1008-794X/CN:31-1796/R]

卷:
期数:
2016年03期
页码:
243-246
栏目:
实验研究
出版日期:
2016-03-25

文章信息/Info

Title:
Comparison of tumor absorbed doses at different time after implantation of 125I seeds with different radioactivity 
作者:
张宏涛 于慧敏 郭利涛 隋爱霞 吴 娟 任菊娜 高 贞 王 娟
Author(s):
ZHANG Hong- tao YU Hui- min GUO Li- tao SUI Ai- xia WU Juan REN Ju- na GAO Zhen WANG Juan
Department of Oncology, Hebei Provincial People’s Hospital, Shijiazhuang, Hebei Province 050051, China
关键词:
【关键词】 125I 治疗计划系统 近距离放射治疗 剂量 活度
文献标志码:
A
摘要:
【摘要】 目的 探讨周边剂量相同时不同活度125I粒子植入后不同时间点肿瘤吸收剂量的差异。 方法 利用计算机三维治疗计划系统(3D-TPS)勾画出边长3.5 cm正方体模拟肿瘤,分别载入125I粒子0.8 mCi(A组)、0.3 mCi(B组)并周边分布,处方剂量145 Gy,得出剂量-体积直方图(DVH)及100%靶体积吸收剂量(D100)、90%靶体积吸收剂量(D90)、150%处方剂量覆盖的体积占靶体积百分比(V150)、90%处方剂量覆盖的体积占靶体积百分比(V90)、最高剂量点等指标。根据125I粒子衰变规律公式,分别计算A、B组粒子植入后1、2、3、4、5、6个月时粒子活度,计算两组粒子植入后各时间点肿瘤实际吸收剂量,比较两组各时间点肿瘤实际吸收剂量、D100、D90、V150、V90、最高剂量点等指标。结果 A组、B组粒子植入后1、2、3、4、5、6个月时肿瘤实际吸收剂量均值相同,均为(81.43±46.20) Gy;D100分别为(49.14±34.65) Gy、(38.86±27.43) Gy,差异有统计学意义(P=0.009);D90均为(64.57±46.20) Gy;V150分别为(7.96±8.62)%、(7.58±10.65)%,差异无统计学意义(P=0.398);V90分别为(25.83±35.76)%、(26.16±35.97)%,差异无统计学意义(P=0.866);最高剂量点分别为(798.29±568.07) Gy、(359.29±256.36) Gy,差异有统计学意义(P=0.010)。结论 周边剂量相同时125I粒子植入后不同时间点肿瘤吸收剂量相同,粒子活度对肿瘤吸收剂量速率无影响,高活度组粒子靶区内最高剂量点明显高于低活度组,高剂量区持续时间较长于低活度组。

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相似文献/References:

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备注/Memo

备注/Memo:
(收稿日期:2015-06-10)
(本文编辑:边 佶)
更新日期/Last Update: 2016-03-22