计算的电剂量图与早期术后MRI之间的相关性,用于评估不可逆的电穿孔
Olivier Sutter1,2, Luc Lafitte2, Olivier Seror1
1Interventional Radiology Unit, Hôpital Avicenne, Hôpitaux Universitaires Paris Seine-Saint-Denis, APHP, Bobigny, France.
Physics in medicine and biology
|October 27, 2025
概括
电场的数值模拟与MRI观察到的肝癌 (HCC) 无可逆向电穿孔 (IRE) 后的剥离区域有很好的相关性. 这有助于预测治疗的有效性,并改善IE程序的决策.
科学领域:
- 医学物理 医学物理
- 在瘤学瘤学.
- 放射学 放射学是指放射学
背景情况:
- 肝细胞癌 (HCC) 是一种常见的肝癌.
- 不可逆的电穿孔 (IRE) 是对HCC的最少侵入性治疗方法.
- 准确评估IRE治疗疗效对于患者的治疗结果至关重要.
研究的目的:
- 为了将数值电场 (EF) 模拟与手术后MRI发现与IRE对HCC后相关联.
- 评估EF模拟在预测组织剥离程度方面的潜力.
- 加强内科手术决策和术后对IE治疗的评估.
主要方法:
- 使用线性静电模型模拟基于实物电脉冲和来自手术内光束CT (CBCT) 的患者特定几何学的3D EF分布.
- 在手术内CBCT和手术后MRI之间的空间注册使用刚性和可变形图像注册 (DIR) 技术进行.
- 模拟剂量和观察到的废弃区域之间的相关性在23个IRE程序中被追溯评估.
主要成果:
- 大约350V/cm的剂量值产生了预测和观察到的剥离区域之间的最佳对应,Dice的中位相似系数为0.74.
- 虽然弹性DIR提供了最高的注册准确性,但更简单的基于地标的翻译注册在本地化模拟EF方面表现强.
- 这项研究包括了22名患者的数据,这些患者接受了23次IRE手术以切除肝脏.
结论:
- EF 模拟显示了预测 HCC. IRE 中组织剥离程度的显著潜力.
- 这些模拟可以有助于在MRI上标准化IRE疗效评估.
- 这些发现表明,EF模拟可以成为改进IRE治疗术内指导和术后评估的宝贵工具.
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