[1]于慧敏,赵金鑫,董建涛,等.125I粒子植入后不同粒子活度和肿瘤缩小速度对靶区剂量学参数的影响[J].介入放射学杂志,2025,34(03):272-277.
YU Huimin,ZHAO Jinxin,DONG Jiantao,et al.The effect of different particle activities and tumor shrinkage speed on the dosimetric parameters of the target area after 125I particle implantation[J].journal interventional radiology,2025,34(03):272-277.
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125I粒子植入后不同粒子活度和肿瘤缩小速度对靶区剂量学参数的影响(
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《介入放射学杂志》[ISSN:1008-794X/CN:31-1796/R]
- 卷:
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34
- 期数:
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2025年03
- 页码:
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272-277
- 栏目:
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实验研究
- 出版日期:
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2025-03-25
文章信息/Info
- Title:
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The effect of different particle activities and tumor shrinkage speed on the dosimetric parameters of the target area after 125I particle implantation
- 作者:
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于慧敏; 赵金鑫; 董建涛; 底学敏; 高贞; 王娟; 张宏涛
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- Author(s):
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YU Huimin; ZHAO Jinxin; DONG Jiantao; DI Xuemin; GAO Zhen; WANG Juan; ZHANG Hongtao
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Division I,Department of Oncology,Hebei Provincial People′s Hospital,Shijiazhuang,Hebei Province 050051,China
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- 关键词:
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【关键词】125I粒子; 动态剂量; 靶体积; 缩小速度; 活度
- 文献标志码:
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A
- 摘要:
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【摘要】目的探讨在相同处方剂量下125I粒子植入后不同粒子活度及肿瘤缩小速度对靶区剂量学参数的影响。方法应用计算机三维治疗计划系统(3D-TPS)勾画模拟出边长为6 cm正方体肿瘤,处方剂量(PD)为100 Gy,选取的125I粒子活度为0.4、0.8 mCi。假设粒子植入术后肿瘤向心性缩小、粒子均匀向心性集中无脱落或游走,肿瘤体积每月以不同速度(0、5%、10%、15%、20%、25%、30%、35%、40%、45%、50%)缩小,根据粒子不同活度分为A1~K1组(0.4 mCi)、A2~K2组(0.8 mCi)。根据125I粒子衰变规律,采用TPS模拟A1~K1组和A2~K2组术后1、2、3、4、5、6个月验证计划得出每组术后不同时间相对应的两种不同活度90%靶体积所接受剂量(D90)以及100%、150%、90%处方剂量所覆盖体积占靶体积百分比(V100、V150、V90)和平均剂量(Dmean)。通过比较不同活度粒子植入肿瘤后D90、V100、V150、V90、Dmean差异,分析不同活度粒子植入肿瘤后肿瘤靶区以0~50%速度缩小的剂量学影响。结果肿瘤靶区每月缩小速度≤30%时,0.4、0.8 mCi组术后1~6个月D90无明显差异;每月缩小速度>30%时,0.8 mCi组D90高于0.4 mCi组;每月缩小速度<25%时,0.4 mCi组V90高于0.8 mCi组,第5~6个月两组V90变化趋于一致;每月缩小速度≥30%时,0.8 mCi组V90高于0.4 mCi组,且随着缩小速度增加,两组差别越大;V100结果与V90结果一致;每月缩小速度<35%时,0.4 mCi组V150高于0.8 mCi组;每月缩小速度≥35%时,0.8 mCi组V150高于0.4 mCi组,且随着缩小速度增加,两组差别越大;每月缩小速度<25%时,0.4 mCi组Dmean高于0.8 mCi组;每月缩小速度≥25%时,0.8 mCi组Dmean高于0.4 mCi组,且随着缩小速度增加,两组差别越大。结论处方剂量相同情况下,肿瘤靶区每月缩小速度<30%时125I粒子活度对D90影响不大,低活度组V90、V100、V150和Dmean均高于高活度组,靶区均匀性相对较好;肿瘤靶区每月缩小速度>35%时,高活度组D90、V90、V100、V150和Dmean均高于低活度组,且高剂量区持续时间长。随着靶区每月缩小速度增大,这种差异更加明显。
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备注/Memo
- 备注/Memo:
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(收稿日期:2024-06-13)
(本文编辑:谷珂)
更新日期/Last Update:
2025-03-25