Novel Algorithm for Distortion Correction of Image Intensifier in X-ray Angiography System

The distortion model of the image intensifier in an X-ray angiography system is complicated because it is different for images acquired in different orientations. We proposed a new method for distortion calculation based on grid phantom, and a novel approach for distortion correction. Through analyzing the distortion in several sampled orientations, a correction model is built, which reflects the relationship between the distortion and orientations, and therefore can be used to correct the distortion of images acquired in arbitrary orientations. Experiments are carried out to evaluate the accuracy, which show that the proposed algorithm is effective and efficient for distortion correction of X-ray angiography images and can be used in real-time applications.

[1]  G.P.M. Prause,et al.  Geometric image correction and iso-center calibration at oblique biplane angiographic views , 1992, Proceedings Computers in Cardiology.

[2]  Fernando Vilariño,et al.  Predictive (un)distortion model and 3-D reconstruction by biplane snakes , 2002, IEEE Transactions on Medical Imaging.

[3]  Anand Rangarajan,et al.  A new point matching algorithm for non-rigid registration , 2003, Comput. Vis. Image Underst..

[4]  D Gibon,et al.  Assessment of image intensifier and distortion for DSA localization studies. , 1997, The British journal of radiology.

[5]  N. Pallikarakis,et al.  A novel approach for distortion correction for X-ray image intensifiers. , 2003, Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society.

[6]  E. Gronenschild.  Effect of spatial orientation on the image-intensifier distortion in quantitative coronary angiography , 1993, Proceedings of Computers in Cardiology Conference.

[7]  Young Jun Roh,et al.  ANALYSIS OF X-RAY IMAGE QUALITIES-ACCURACY OF SHAPE AND CLEARNESS OF IMAGE-USING X-RAY DIGITAL TOMOSYNTHESIS , 1997 .

[8]  Torbjørn Sund,et al.  An algorithm for fast adaptive image binarization with applications in radiotherapy imaging , 2003, IEEE Transactions on Medical Imaging.

[9]  J. Rousseau,et al.  Correction of image distortion for stereotactic DSA localization , 1995, Proceedings of 17th International Conference of the Engineering in Medicine and Biology Society.