DOI: 10.3724/SP.J.1146.2012.01565

Journal of Electronics & Information Technology (电子与信息学报) 2013/35:12 PP.2942-2947

A Constrained Imaging and Registration Scheme Based on Time-varying Anatomical Priors

Due to the time-varying anatomical information in the applications of magnetic resonance dynamic imaging and functional neuroimaging, the traditional constrained imaging suffers the imaging error and the long registration time. In this paper an imaging strategy is proposed to reconstruct rapidly a low-resolution image as the reference image, and make the image registration based on Mutual Information (MI) metric of two images combined with landmark curvature mapping. The proposed method calculates and compares the MI of adjacent frames of temporal image sequences before and after registration to decide whether to update reference images, as well as to verify the registration results. Experimental results show that the proposed method achieves high registration precision and reduces dramatically the computational cost, and thus it can be applied to real-time dynamic imaging.

Key words:Image registration,Constrained imaging,Mutual Information (MI),Curvature mapping,Anatomical prior information

ReleaseDate:2014-07-21 17:04:30