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首页> 外文期刊>Medical image analysis >Projection-based motion compensation and reconstruction of coronary segments and cardiac implantable devices using rotational X-ray angiography.
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Projection-based motion compensation and reconstruction of coronary segments and cardiac implantable devices using rotational X-ray angiography.

机译：基于投影的运动补偿以及使用旋转X射线血管造影术重建冠状动脉节段和心脏可植入设备。

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摘要

Cardiologists use two-dimensional projection images in conventional X-ray coronary angiography for the assessment of three-dimensional structures. During minimally invasive interventions there is a need to clearly visualize and analyze contrast filled coronary arteries, surrounding tissue, and implanted devices. Three-dimensional reconstruction of these structures is challenging due to the cardiac and respiratory motion. In this paper we describe a method to automatically generate motion compensated reconstructions of various structures using rotational X-ray angiography. The method uses markers on a device or guide wire to identify and estimate the motion of an object or region of interest in order to register and motion compensate the projection images to generate a motion compensated reconstruction. The method is evaluated on 20 rotational acquisitions and the average marker couple detection rate is 84% for cardiac stents, 90% for closure devices and 20% for contrast filled coronaries. The projection images are motion compensated based on the semi-automatically detected markers and subsequently used for reconstruction. We conclude that it is feasible to reconstruct cardiac stents, closure devices, contrast filled coronaries, and calcified plaques using rotational X-ray angiography.
机译：心脏病专家在常规的X射线冠状动脉造影术中使用二维投影图像来评估三维结构。在微创干预期间，需要清楚地可视化和分析造影剂填充的冠状动脉，周围组织和植入装置。由于心脏和呼吸运动，这些结构的三维重建具有挑战性。在本文中，我们描述了一种使用旋转X射线血管造影术自动生成各种结构的运动补偿重建的方法。该方法使用设备或导线上的标记来识别和估计感兴趣的对象或区域的运动，以便对投影图像进行配准和运动补偿，以生成运动补偿的重建。对该方法进行了20次旋转采集评估，对于心脏支架，平均标记物耦合检测率为84％，对于闭合装置为90％，对于造影剂冠状动脉为20％。投影图像基于半自动检测到的标记进行运动补偿，然后用于重建。我们得出结论，使用旋转X射线血管造影术重建心脏支架，闭合装置，造影剂填充的冠状动脉和钙化斑块是可行的。

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