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液体填充离子室阵列升级后的剂量测量表征和对立体战术计划验证改进的评估

Morgan Healy¹, Michael Roche¹, Darren Coen¹

¹CUH-UCC Cancer Centre, Cork University Hospital, Wilton, Cork, Ireland.

Journal of applied clinical medical physics

|December 19, 2025

概括

一个升级的OCTAVIUS 1000SRS阵列显示了改善的剂量测量性能,用于立体性废除性放射治疗 (SABR) 验证. 提高线性和减少信号泄漏导致临床VMAT交付中更准确的测量.

科学领域:

医学物理医学物理
辐射瘤学辐射瘤学
放射治疗剂量计放射治疗剂量计

背景情况:

立体性废除性放射治疗 (SABR) 需要精确的剂量验证,因为高剂量的辐射.
卷度调制弧线疗法 (VMAT) 和动态符合弧线疗法 (DCAT) 是先进的SABR输送技术.
带有1000SRS阵列的OCTAVIUS 4D系统提供了用于SABR计划验证的3D剂量矩阵.

研究的目的:

为了比较OCTAVIUS 1000SRS阵列在升级之前和之后的剂量测量特性.
评估升级对射线疗法应用中的阵列性能的影响.

主要方法:

升级后的阵列性能进行了测试,并与升级前的测量进行了比较.
评估的参数包括室校准,有效测量点,信号泄漏,剂量速率线性,输出因子和马分析通过率.
十个肺部和肝脏SABR计划被用于马分析.

主要成果:

升级改进了信号泄漏和离轴室的相对校准.
增强的剂量速率线性允许为VMAT输送单个校准文件.
在2%/1毫米标准下,马分析的合格率增加了9.2%.

结论:

OCTAVIUS 1000SRS阵列升级对剂量测量性能产生了积极的影响,特别是对于VMAT.
由于不受影响的外和EPOM,定位或测量设置不需要更改.
在非参考条件下的测量现在更准确,因为改进了线性,校准和减少泄漏.

关键词:

奥克塔维乌斯1000 SRS SABR PSQA 标签: 赛博赛博赛博赛博

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