Tracking errors in a prototype real-time tumour tracking system
Tracking errors in a prototype real-time tumour tracking system
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DOI：
10.1088/0031-9155/49/23/011
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发表时间：
2004-12-07
影响因子：
3.5
通讯作者：
Shirato, H
中科院分区：
文献类型：
--
作者：
Sharp, GC;Jiang, SB;Shirato, H
在运动补偿放射治疗中，不透射线的标记物可以植入肿瘤中或肿瘤附近，并使用荧光成像实时跟踪。跟踪这些植入的标记提供了高度准确的位置信息，除非由于成像条件差或模糊而导致跟踪失败。本研究探讨了跟踪误差的自动检测方法，并评估了使用原型实时肿瘤跟踪系统跟踪误差对治疗的频率和影响。我们研究了跟踪误差自动检测的四个指标。并发现相应射线之间的距离最有效。我们还发现，跟踪误差会导致门控效率损失7.6%至10.2%。跟踪误差期间治疗射束输送的发生率估计在0.8%和1.25%之间。
In motion-compensated radiation therapy, radio-opaque markers can be implanted in or near a tumour and tracked in real-time using fluoroscopic imaging. Tracking these implanted markers gives highly accurate position information, except when tracking fails due to poor or ambiguous imaging conditions. This study investigates methods for automatic detection of tracking errors, and assesses the frequency and impact of tracking errors on treatments using the prototype real-time tumour tracking system. We investigated four indicators for automatic detection of tracking errors. and found that the, distance between corresponding rays was most effective. We also found that tracking errors cause a loss of gating efficiency of between 7.6 and 10.2%. The incidence of treatment beam delivery during tracking errors was estimated at between 0.8% and 1.25%.