基于深度学习的linac光束建模与稀疏光束数据测量
Sang Hee Ahn1, Jin Sung Kim2,3, Jihun Kim4
1Department of Radiation Oncology, Samsung Medical Center, Seoul, Republic of Korea.
Physics in medicine and biology
|July 4, 2025
概括
一个新的深度学习模型,linac束模型网络 (LBMnet),有效地预测了放射治疗束数据. 与传统的测量方法相比,这种方法提高了准确性并节省了时间.
科学领域:
- 医学物理 医学物理
- 辐射瘤学 辐射瘤学
- 机器学习 机器学习
背景情况:
- 精确的Linac光束建模对于有效的放射治疗至关重要.
- 传统的光束数据采集方法耗时且资源密集.
研究的目的:
- 引入 linac 束模拟网络 (LBMnet),这是一个深度学习方法,用于高效的 linac 束模拟.
- 为了提高产生百分比深度剂量 (PDD) 和辐射疗法的光束配置文件的准确性和效率.
主要方法:
- 使用自动编码器架构开发了LBMnet,该架构是根据Elekta Versa HDTM linacs的稀疏单场测量训练的.
- 采用数据增强和伪资料输入,以提高预测准确度.
- 根据测量束数据和使用马分析 (1%/1毫米和0.5%/0.5毫米标准) 评估的临床剂量分布进行了验证的预测.
主要成果:
- 在22厘米深度内,LBMnet实现了PDD预测准确度在±2%以内.
- 个人资料预测显示,高剂量区域的最大差异在3%以内,半暗中偏差较小.
- 临床剂量分布显示,超过99%和91%的患者符合1%/1毫米和0.5%/0.5毫米的标准.
结论:
- 在放射治疗中,LBMnet显示了提高光束建模精度和效率的巨大潜力.
- 该模型即使在有限的数据集上也提供了可靠的预测,为传统方法提供了可靠的,节省时间的替代方案.
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