When doctors performed an X-ray angiogram expecting to find and treat a blood clot that had caused Mrs.

医生给她做了X光血管造影，期待着发现并治疗引发其症状的血栓。

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In the X-Ray angiogram, the precise estimation of vascular centerlines and widths is very important for the quantitative and visualized diagnosis of blood vessel disease.

在血管造影图像中，精确估计血管中心线和宽度是血管疾病量化与可视化诊断的先决条件。

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In fact, while the low-risk patients might not receive any benefit from the test, there is at least some risk from radiation--which is higher for a CT angiogram than a traditional X-ray.

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