Deformable image registration

Abstract

A method (100) for performing deformable image registration on first and second volumetric medical images is disclosed. The method comprises (i) for each of images, extracting features at each of a plurality of different scales, (ii) initiating a mapping, such as a deformation field or a velocity field, between the first and second volumetric medical images at the lowest of the plurality of different scales, and (iii) sequentially, for each scale of the plurality of different scales that is above the lowest scale, predicting a mapping between the first and second volumetric medical images at a given scale using a deformation field and features extracted from the first and second volumetric medical images at the scale immediately below the given scale, and correcting the predicted mapping between the first and second volumetric medical images at the given scale using features extracted from the first and second volumetric medical images at the given scale. The method further comprises (iv) predicting the deformation field between the first and second volumetric medical images at full resolution using the corrected prediction of the mapping at the highest of the plurality of different scales

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