评估和实施一个独立的千伏X射线成像平台,用于碳离子放射治疗
Yixiao Guo1,2,3, Zhiqiang Liu1,4, Qingzhen Zhu5
1Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, Gansu, China.
Journal of applied clinical medical physics
|February 9, 2026
概括
新的滑动吊圆束计算机断层扫描 (CBCT) 和双面板数字放射 (DR) 系统为碳离子放射治疗 (C-ion RT) 提供了更好的图像质量. 这些系统实现了0.5毫米以下的定位精度,支持临床集成.
科学领域:
- 医学物理 医学物理
- 放射治疗技术 放射治疗技术
- 医疗成像医学成像
背景情况:
- 图像引导粒子疗法 (IGPT) 已经进步,但碳离子放射疗法 (C-ion RT) 的成像解决方案是有限的.
- 质子疗法成像已经得到很好的发展,突出了C离子RT能力的差距.
研究的目的:
- 引入和评估用于C-ion RT的新型滑动吊圆束计算机断层扫描 (CBCT) 和双面板数字放射 (DR) 系统.
- 评估图像质量指标并验证这些独立成像系统的定位准确性.
主要方法:
- 使用Catphan 700幻影评估图像质量,用于空间分辨率,低对比度分辨率,均性和有效的成像区域.
- 定位精度使用人类形象幻影进行评估,分析CT切片厚度,辐射质量和注册算法的影响.
- 通过患者研究验证的临床可行性.
主要成果:
- CBCT的空间分辨率:0.90 lp/mm;DR:2.80 lp/mm (在平面上). 两者都实现了2.30%的低对比分辨率.
- DR显示出优越的图像统一性 (1.12%-1.40%) 与CBCT (2.20%);有效的成像区域是可比的 (99.30%-99.50%).
- 平均转换位移在0.01-0.48mm之间;CBCT和DR在很大一部分分数中实现了2mm/2°内的定位精度.
结论:
- 开发的CBCT和DR系统展示了卓越的图像质量和0.5毫米以下的定位精度.
- 这些成像解决方案在临床上是可行的,可以集成到碳离子RT工作流中.
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