[1]贾鹏飞,赵 辉.真实胆管弧度下胆道支架联合125I粒子条治疗恶性梗阻性黄疸的剂量学研究[J].介入放射学杂志,2022,31(08):775-785.
 JIA Pengfei,ZHAO Hui..Biliary stent combined with 125I seed strand implantation under real biliary radian guidance in the treatment of malignant obstructive jaundice: a dosimetric study[J].journal interventional radiology,2022,31(08):775-785.
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真实胆管弧度下胆道支架联合125I粒子条治疗恶性梗阻性黄疸的剂量学研究()

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

卷:
31
期数:
2022年08
页码:
775-785
栏目:
非血管介入
出版日期:
2022-09-30

文章信息/Info

Title:
Biliary stent combined with 125I seed strand implantation under real biliary radian guidance in the treatment of malignant obstructive jaundice: a dosimetric study
作者:
贾鹏飞 赵 辉
Author(s):
JIA Pengfei ZHAO Hui.
Department of Interventional Radiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province 226001, China
关键词:
【关键词】 恶性梗阻性黄疸 真实胆管弧度 125I粒子条 胆道支架 剂量学
文献标志码:
A
摘要:
【摘要】 目的 比较胆道支架联合125I粒子条在胆管弧度下和直线排列下的剂量学差异,评估粒子条在胆管弧度下危及器官(organ at risk, OAR)的受量情况,为胆道支架联合粒子条治疗恶性梗阻性黄疸疾病(malignant obstructive jaundice,MOJ)的有效性及安全性提供剂量学参考。方法 收集行术后验证的18例患者的CT图像导入治疗计划系统(treatment planning system,TPS),靶区及OAR进行勾画,同时制作出治疗计划,并定义为真实胆管组。直线模型组为按照每例患者植入支架的尺寸、粒子条的粒子数及梗阻段的长度在TPS上制作出直线模型并制作计划。统计分析两组靶区在剂量体积参数、适形指数(conformity index,CI)、靶区外体积指数(external index,EI)及均匀指数(homogeneity index,HI)上的差异,并且评估粒子条处于真实胆管弧度状态时,OAR在各粒子活度下的受量情况。结果 与直线模型组相比,真实胆管弧度会降低两靶区的D80%、D90%、D100%,且下降幅度与粒子活度成正比,也会降低两靶区的V80%、V90%、V100%、V200%。其中,当使用粒子活度为0.8 mCi的粒子条时,真实胆管组靶区一的D90、V90、V200分别为70.98 Gy、93.81%、43.48%;当使用粒子活度为1.0 mCi的粒子条时,真实胆管组靶区二的D90、V90、V200分别为59.95 Gy、84.45%、31.88%。两靶区的CI、EI、HI均较差,与直线模型组相比,真实胆管弧度会降低CI,而在一定程度上改善EI及HI。串行器官中除肝动脉及肝门静脉的照射受量较高,最大剂量(maximum dose,Dmax)分别为105.28~210.56 Gy、257.53~515.05 Gy,其他组织照射受量均较低。并行器官中胃的Dmax为80.25~160.50 Gy,十二指肠的V30 Gy、V50 Gy分别为5.29~13.81 cm3、2.11~7.09 cm3,胰腺的D33%为9.00~17.99 Gy,肝肾的照射受量较低。 结论 与直线模型相比,胆管弧度会降低肿瘤靶区的剂量体积参数及适形度,但能改善靶区的均匀度及靶区外的受照体积。对于胆管壁无明显增厚的MOJ,植入粒子活度为0.8 mCi的粒子条,胆管EQD2可达到60 Gy。

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备注/Memo

备注/Memo:
(收稿日期:2021- 09- 02)
(本文编辑:新 宇)
更新日期/Last Update: 2022-09-26