关键词: 医学图像, 弹性配准, 轮廓, 紧支撑径向函数

Abstract: A method of medical image elastic registration based on contours is presented in this paper. In this method, the contour of the object is first abstracted, and then the centroid of the object is calculated. Around the centroid, the points on the contour are calculated at the same interval of angle, and these points work as the feature points. Their corresponding relation can be determined by calculating similarity. The ψ-function proposed by H.Wendland is adopted as radial based functions in the elastic transform. The transformation coefficient can be computed with the two sets of feature points. Finally, the deformed image can be registered. The experiment shows that this method is fast and effective to deformed medical image registration.

Key words: medical image, elastic registration, contour, compactly supported radial functions