Multi-resolution 3D medical image registration using improved hybrid strategy
Hongwei Ying · Computer Engineering and Applications Journal · 2010
Multi-resolution 3D medical image registration algorithms using hybrid strategy have been implemented widely.However,these hybrid algorithms only focus on the mixture of optimization algorithm.The influence of resolution on registration based on first-order Mutual Information(MI) or second-order MI is studied.Then,the improved strategy with hybrid similarity metric and hybrid optimization algorithm is introduced for two-level multi-resolution registration,which adoptes more suitable similarity metric for each level.Results demonstrate that the overall registration accuracy of the improved method outperforms that of method based on single similarity metric and achieved the subvoxel accuracy.In addition,the speed of the proposed algorithm is faster than that of second-order MI,slightly slower than first-order MI.