评估放射治疗软件中曲校正校准错误对图像匹配的影响
Yumi Yamazawa1, Akitane Osaka1, Yasushi Fujii2
1Department of Radiology, Niigata Prefectural Central Hospital, 205, Shin-minamimachi, Niigata, 205943-0192, Japan.
Physical and engineering sciences in medicine
|February 19, 2024
概括
放射治疗软件的曲校正错误显著影响图像匹配的准确性. 柔性地图中的校准错误导致自动匹配的不准确性和圆束计算断层扫描图像的变形.
科学领域:
- 医学物理 医学物理
- 放射治疗技术 放射治疗技术
- 图像分析 图像分析
背景情况:
- 放射治疗的准确性依赖于精确的图像匹配.
- 在成像系统中,曲校正可以引入校准错误.
- 这些错误可能会影响自动匹配算法的可靠性.
研究的目的:
- 量化掉落校正校准错误对放射治疗软件中图像匹配的影响.
- 分析校准错误,图像变形和自动匹配精度之间的关系.
- 在评估这些错误时,比较不同软件应用程序的性能.
主要方法:
- 使用了三个带有和没有聚甲基甲酸棒的放射治疗软件应用程序.
- 通过在九个曲图 (FMs) 中移动球轴承 (BB) 引入了校准错误.
- 在形束计算机断层扫描 (CBCT) 图像中评估图像变形,并分析了与BB转移和自动匹配差异的相关性.
主要成果:
- 软件之间的温斯顿-卢茨测试平均差异在0.1mm以内.
- 在BB转移和Lucy幻影匹配错误之间发现了高的确定系数 (R2 ≥0.99).
- 在BB转移和变形向量值之间观察到强烈的相关性 (r ≈ 0.95).
结论:
- 屈曲校正校准错误是自动匹配错误和CBCT图像变形的原因之一.
- 这些发现强调了准确校准对于可靠的放射治疗图像指导的重要性.
- 在评估这些特定的成像工件时,存在软件变异.
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