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内断成像可以取代中期治疗的圆束断层扫描,用于肺部的立体性废弃辐射疗法患者,以提高治疗效率
Maryam Hazem1, Menglei Chao1, Roland Yeghiaian-Alvandi1
1Nepean Cancer & Wellness Centre, Nepean Hospital, Kingswood, New South Wales, Australia.
Advances in radiation oncology
|February 2, 2024
概括
内断成像 (IFI) 可以取代中期治疗的形束计算断层扫描 (CBCT) 在肺部的立体压缩体辐射疗法 (SABR),提高治疗效率. 这项研究发现IFI和CBCT之间存在很强的相关性,支持其临床使用.
科学领域:
- 辐射瘤学 辐射瘤学
- 医疗成像医学成像
- 放射治疗 物理 物理
背景情况:
- 肺部立体压缩体辐射疗法 (SABR) 需要精确的成像来准确的剂量输送.
- 中期治疗圆束计算机断层扫描 (CBCT) 用于患者定位,但可以延长治疗时间.
- 内断成像 (IFI) 提供了一个潜在的替代方案,可以在治疗期间实时验证治疗的位置.
研究的目的:
- 评估中期治疗中CBCT用内断成像 (IFI) 替换的可行性.
- 评估IFI在提高肺SABR患者治疗效率方面的潜力.
- 在所有六个自由度中确定IFI和MT CBCT之间的相关性.
主要方法:
- 对10名接受VMAT治疗的肺SABR患者的成像数据的回顾性分析.
- 从FI数据中提取转换 (Tx, Ty, Tz) 和旋转 (Rx, Ry, Rz) 位置错误.
- 将IFI数据与相应的中期处理CBCT值进行比较,以评估相关性.
主要成果:
- 对Tx,Tz和所有旋转参数 (Rx,Ry,Rz) 观察到出色的类间相关系数 (ICC).
- 对 Ty 发现了一个很好的 ICC,这表明 IFI 和 MT CBCT 之间有很强的协议.
- 布兰德-阿尔特曼分析显示,在所有转化和旋转参数中,偏差最小,一致性可接受的极限.
结论:
- IFI证明了与肺SABR中的中期治疗CBCT的有希望的相关性.
- IFI是MT CBCT的可行的替代品,支持其用于临床决策.
- 实施IFI可以显著提高肺SABR协议中的治疗效率.
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