Efficient Groupwise Registration of MR Brain Images via Hierarchical Graph Set Shrinkage.

Efficient Groupwise Registration of MR Brain Images via Hierarchical Graph Set Shrinkage. Med Image Comput Comput Assist Interv. 2018 Sep;11070:819-826 Authors: Dong P, Cao X, Yap PT, Shen D Abstract Accurate and efficient groupwise registration is important for population analysis. Current groupwise registration methods suffer from high computational cost, which hinders their application to large image datasets. To alleviate the computational burden while delivering accurate groupwise registration result, we propose to use a hierarchical graph set to model the complex image distribution with possibly large anatomical variations, and then turn the groupwise registration problem as a series of simple-to-solve graph shrinkage problems. Specifically, first, we divide the input images into a set of image clusters hierarchically, where images within each image cluster have similar anatomical appearances whereas images falling into different image clusters have varying anatomical appearances. After clustering, two types of graphs, i.e., intra-graph and inter-graph, are employed to hierarchically model the image distribution both within and across the image clusters. The constructed hierarchical graph set divides the registration problem of the whole image set into a series of simple-to-solve registration problems, where the entire registration process can be solved accurately and efficiently. The final deformation pathway of each image to ...
Source: MICCAI International Conference on Medical Image Computing and Computer-Assisted Intervention - Category: Radiology Tags: Med Image Comput Comput Assist Interv Source Type: research