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基于MRI的图像导向适应式支臂疗法用于临床例行中局部晚期的宫癌:单个机构的经验

Zoltán Végváry¹, Renáta Kószó¹, Zsófia Együd¹

¹Department of Oncotherapy, University of Szeged, Szeged, Hungary.

Pathology oncology research : POR

|May 16, 2025

概括

基于MRI的图像引导自适应式支臂治疗 (IGABT) 在宫癌患者中显著改善了高风险的临床目标体积剂量覆盖率. 这种技术提供了更好的瘤剂量升级,同时保持可比器官的风险剂量,支持其临床实施.

科学领域:

在瘤学瘤学.
辐射疗法辐射疗法
医疗成像医学成像

背景情况:

局部晚期的宫癌治疗从剂量升级中获益.
风险器官 (OAR) 剂量和毒性控制在放射治疗中至关重要.
基于MRI的图像引导自适应式支臂治疗 (IGABT) 是一种新兴的技术.

研究的目的:

为了比较基于MRI的IGABT与CT的图像指导,用于宫癌支臂治疗.
评估基于MRI的IGABT对目标体积剂量覆盖率和OAR剂量的影响.
评估基于MRI的IGABT的可行性和急性毒性.

主要方法:

一项对50名患有局部晚期宫癌的患者进行的比较研究.
两个队列接受了化学放射治疗后的胸膜疗法 (BT) 增强:MRI-IGABT (24名患者) 和仅CT (26名患者).
在目标体积,OAR划分和剂量处方方面遵循EMBRACE II协议.

主要成果:

与CT-only指导相比,MRI-IGABT显示高风险临床目标体积 (CTVHR) 的D90剂量覆盖率显著更高 (7.37 Gy vs. 6.87 Gy).
一个强烈的趋势有利于MRI-IGABT用于CTVHR D98覆盖范围 (6.16 Gy对比5.72 Gy).
累积的CTVHR剂量 (D90和D98) 与MRI-IGABT显著更高; OAR剂量到膀,直肠和sigmoid在两组之间是可比的.

结论:

基于MRI的IGABT显著提高了宫癌治疗中的目标剂量覆盖率.
该技术支持瘤剂量升级,同时保护处于风险中的器官.
临床结果支持IGABT作为图像引导适应性放射治疗 (IGART) 的关键组成部分.

关键词:

基于MRI的支臂疗法.适应性放射疗法适应性放射疗法宫癌:子宫癌是一种癌症.图像指导式手臂疗法是指导式手臂疗法.间歇性手臂疗法 (英语:interstitial brachytherapy) 是一种间歇性手臂疗法.

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