Distortion correction based on pixel-movement model in angiography system

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.