Radiation therapy (RT) planning frequently utilizes contrast‐enhanced CT. However, dose calculations should not be performed on a contrast‐enhanced CT because the patient will not receive bolus during treatment. It is typical to acquire CT twice during RT simulation: once before injection of bolus and once after. The registration between these datasets introduces errors. In this work, we investigate the use of virtual noncontrast images (VNC) derived from dual‐energy CT (DECT) to eliminate the precontrast CT and the registration error.

中文翻译：

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技术说明：使用双能CT的虚拟非对比图像消除了腹部肿瘤X线放射治疗规划中的对比前CT需求†

放射治疗（RT）计划经常使用对比增强CT。但是，不应在对比增强的CT上进行剂量计算，因为患者在治疗期间不会接受推注。通常在RT模拟过程中两次获取CT：一次在推注之前，一次在之后。这些数据集之间的配准会引入错误。在这项工作中，我们研究了使用源自双能CT（DECT）的虚拟非对比图像（VNC）来消除对比前CT和配准误差。