用PET/CT进行90Y微球放射栓塞的Voxel水平剂量测量方法的比较评估
Hai Hu1,2,3,4, Zi-Wei Liang5, Ya-Bo Zhao1,2
1Center for Advanced Quantum Studies, School of Physics and Astronomy, Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian District, Beijing 100875, China.
Molecular pharmaceutics
|January 15, 2026
概括
声素S值 (VSV) 方法为90微球放射栓塞提供了准确,快速的剂量测量,优于局部能量沉积,接近肝癌治疗的蒙特卡洛模拟速度.
科学领域:
- 医学物理 医学物理
- 放射学 放射学是一门学科.
- 核医学就是核医学.
背景情况:
- -90 (Y) 微球放射栓塞是肝癌的标准治疗方法.
- 精确的治疗后剂量测量对于优化患者的治疗结果至关重要.
- 目前的voxel水平剂量测量方法需要对临床适用性进行评估.
研究的目的:
- 为了比较三种剂量测量方法的准确性和计算效率:蒙特卡洛 (MC),voxel S值 (VSV) 和局部能量沉积 (LDM).
- 评估这些方法的临床实用性,用于90Y放射栓塞剂量验证.
主要方法:
- 对68名用90Y微球治疗的患者的治疗后PET/CT数据的分析.
- MC模拟作为剂量计的参考标准.
- VSV方法涉及卷PET图像与预先计算的Y内核;LDM假定完全的局部能量吸收.
主要成果:
- VSV实现了接近MC的准确性,并显著减少了计算时间 (MC的秒数与小时).
- 在高剂量地区,LDM高估了剂量,并且与MC相比显示了更大的偏差.
- VSV与MC的一致性很高,平均剂量和EUBED的差异很小,Bland-Altman极限更为严格.
结论:
- 在90Y放射栓塞中,VSV提供了一种临床实用的解决方案,用于快速和可靠的voxel水平剂量测量.
- 该VSV方法结合了MC级准确度与大大减少的计算时间.
- 在肝癌治疗中,VSV可以支持个性化治疗评估和剂量验证.
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