Center for Automated Learning and Discovery
School of Computer Science, Carnegie Mellon University


Learning-based Neuroimage Registration

Leonid Teverovskiy, Yanxi Liu

October 2004

Also appears as Robotics Institute Technical Report CMU-RI-TR-04-59


Keywords: Feature vectors, feature selection, interesting voxels, deformable registration, image pyramid, thin plate splines, RANSAC

Neuroimage registration has been a crucial area of research in medical image analysis for many years. Aligning brain images of different subjects in such a way that same anatomical structures correspond spatially is required in many different applications, including neuroimage classification, computer aided diagnosis, statistical quantification of human brains and neuroimage segmentation. We combine statistical learning, computer vision and medical image analysis to propose a multiresolution framework for learning-based neuroimage registration. Our approach has four distinct characteristics not present in other registration methods. First, instead of subjectively choosing which features to use for registration, we employ feature selection at different image scales to learn an appropriate subset of features for registering specific pair of neuroimages. Second, we use interesting-voxel selection to identify image voxels that have the most distinct image feature vectors. These voxels are then used to estimate the deformation field for registration. Third, we iteratively improve our choice of features and interesting voxels during registration process. Fourth, we create and take advantage of a statistical model containing information on image feature distribution in each anatomical location.

34 pages

SCS Technical Report Collection
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