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基于CBCT的前列腺癌在线自适应性放射治疗:剂量测量方面和与非自适应性常规IGRT的比较
Niklas Christian Scheele1,2, Jann Fischer1,2, Lovis Hampe1,2
1Department of Radiotherapy and Radiation Oncology, University Medical Center, Göttingen, Germany.
Technology in cancer research & treatment
|January 12, 2026
概括
在线适应性放射疗法 (oART) 通过每天调整计划,提高瘤覆盖率和节省健康器官,显著提高前列腺癌治疗精度. 虽然oART需要更长的时间,但与传统的图像引导放射治疗 (IGRT) 相比,它提供了更好的结果.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
- 在瘤学瘤学.
背景情况:
- 在放射治疗期间前列腺癌患者的解剖学变化可能会损害治疗效率并增加毒性.
- 传统的图像引导放射治疗 (IGRT) 依赖于固定边缘,可能导致治疗不足或过度.
- 在线适应性放射疗法 (oART) 通过根据实时解剖进行日常计划调整来提供解决方案.
研究的目的:
- 为了比较在线自适应性放射治疗 (oART) 与前列腺癌常规图像导向放射治疗 (IGRT) 的有效性.
- 评估剂量测量改进,目标覆盖,危险器官 (OAR) 节省和计划可接受性.
- 评估间断前列腺体积变化和治疗持续时间.
主要方法:
- 对6名前列腺癌患者的153个治疗分量的回顾性分析,这些患者在Varian Ethos系统上接受了oART治疗.
- 评估使用圆束计算机断层扫描 (CBCT) 数据的计划,调整和验证计划.
- 对目标体积和OAR的剂量-体积组图 (DVH) 指标的评估,以及临床可接受性.
主要成果:
- 与计划计划相比,oART显著改善了CTV D98% (97.85%至98.55%) 和PTV D98% (90.1%至97.1%).
- 临床上可接受的计划从24.8% (计划) 大幅增加到98% (适应).
- oART在节省肠道和膀方面表现出剂量优势,尽管治疗时间翻了一番.
结论:
- 在线适应性放射治疗 (oART) 提高了前列腺癌治疗中的目标剂量覆盖率和OAR节省.
- 与传统IGRT相比,oART显著提高了计划的可接受性,并减少了剂量变化.
- 尽管治疗时间增加了,但oART代表了前列腺癌放射治疗的更精确和更有效的方法.
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