北京理工大学信息科学技术学院光电工程系,北京,100081
纸质出版:2008
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李颖超, 王涌天, 杨 健. 基于像素运动模型的数字 造影系统成像畸变校正[J]. 电子学报, 2008,36(8):1473-1479.
LI Ying-chao, WANG Yong-tian, YANG Jian. Distortion Correction Based on Pixel-Movement Model in Angiography System[J]. Acta Electronica Sinica, 2008, 36(8): 1473-1479.
提出一种基于像素运动模型的数字造影系统成像畸变的校正方法.通过在一些间隔均匀的方位上获取标志板图像
利用单幅图像的畸变校正算法计算出各幅图像中的像素受畸变影响而产生的运动
并据此求得像素运动模型的参数.利用该模型可以校正C型臂在任意方位下获取的造影图像的畸变.实验证明
该算法具有较高的精度和较快的速度.
A new algorithm for distortion correction based on pixel-movement model(PMM)in angiography system is proposed.The parameters of PMM are derived by analyzing the pixel movement induced by the distortion(calculated by a single-image distortion correction method)in a series of phantom images acquired by a certain interval of orientation angle.The model allows distortion correction of angiographic images acquired in any arbitrary C-arm orientation.Experimental results demonstrate that the proposed algorithm is fast with high accuracy for distortion correction of angiography images.
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