只有磁共振的快速桌面规划和脊柱转移的立即治疗
Jerrold E Kielbasa1, Logan Kimble1, Justin Rineer1
1Department of Radiation Oncology, Orlando Health Cancer Institute, United States.
Physics and imaging in radiation oncology
|July 7, 2025
概括
一个新的磁共振 (MR) 协议使得脊柱转移的治疗计划能够快速地在桌面上进行,在30分钟内实现安全有效的息. 这个工作流集成了MR模拟,规划和即时治疗,以更快地照顾患者.
科学领域:
- 辐射瘤学 辐射瘤学
- 医学物理 医学物理
- 放射治疗规划 放射治疗规划
背景情况:
- 对于疼痛的脊柱转移而进行的息性放射治疗往往面临着工作流效率低下的问题.
- 磁共振模拟 (MR-SIM) 提供了改善治疗规划的潜力.
- 将MR-SIM集成到即时治疗工作流中可以加快患者护理.
研究的目的:
- 开发和评估一个仅用于MR的治疗计划协议.
- 为了使脊柱转移的桌面规划和立即治疗提供.
- 评估使用MR-SIM快速息的可行性.
主要方法:
- 使用MR-SIM开发了一个协议,包含结构库,默认光束模板,批量密度赋值和固定的优化参数.
- 用MR-SIM协议为健康志愿者生成了35个治疗计划.
- 计划被转移到CT-SIM图像进行剂量测量比较,并对整个工作流进行了时间研究.
主要成果:
- 所有的MR-SIM计划都实现了可接受的剂量分配,其中100%被认为是临床适当的.
- 剂量参数与处方水平密切匹配,最大点剂量在3.2%以内,最小剂量在2.8%以内达到目标的90%.
- 从患者设置到治疗完成的完整工作流程,平均为3 Gy/10分数计划23.6分钟,为8 Gy单个分数计划25.4分钟.
结论:
- 只有MR的治疗规划方案对于脊柱转移的缓解是有效的.
- 开发的工作流允许在不到30分钟的时间内提供安全和快速的治疗.
- 这种方法在桌上计划后便于立即治疗,提高了患者的吞吐量.
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