基于未标定单平面造影图像的冠状动脉树三维重建

3-D Reconstruction of Coronary Arterial Trees from Uncalibrated Monoplane Angiographic Images

提出了一种基于两幅未标定单平面造影图像的冠状动脉树三维重建新方法.该方法在不对设备和图像进行标定的情况下,仍然能够对低阶的畸变进行校正,对C型臂运动模型进行估计,并且充分利用到了病床的运动信息;同时,该方法不仅能够用于投影焦距不变的系统,同样也能够应用于投影焦距发生较大改变的系统,具有较大的灵活性.实验结果统计表明:该文提出的冠状动脉三维重建方法具有较高的有效性和鲁棒性,能够获得小于0.26mm的重投影误差,大大提高了基于非标定造影图像冠状动脉三维重建的精度.

This paper presents a novel method for the 3-D reconstruction of coronary arterial trees from two uncalibrated monoplane angiographic images. This method does not require independent calibration of the phantom. The lower-order distortion, transformations of the C-arm and the movement of the table can be effectively estimated. This method is very flexible because it can not only be applied to images with the same focal lengths, but also can be used to images with different focal lengths. Experimental results show that the proposed method is very robust and effective for the reconstruction of coronary arterial trees, and is able to achieve less than 0.26 mm of back-projection RMS errors, which represents a great improvement on the accuracy of the 3-D reconstruction of coronary arteries from uncalibrated images.