Motion correction apparatus and method

摘要

An apparatus for providing a motion-corrected time series of image data sets, comprises an image selection unit for obtaining a series of sets of image data, each set of image data representative of a region at a different time, and for automatically determining a sub-region of interest, and a registration unit that is configured to, for each of a plurality of sets of image data in the series, perform a registration, for the sub-region of interest, to register one of a reference data set of the series and the set of image data to the other of that reference data set and the set of image data.

主权项

1. A medical image processing apparatus, comprising:
an image selection circuit that obtains a series of sets of image data, each set of image data representative of a region at a different time, and performs a segmentation process to segment a bone region as an anatomical feature in at least one of the sets of image data to determine a sub-region of interest comprising the anatomical feature; a registration circuit that, for each set of image data of a plurality of the sets of image data in the series, performs a global registration process to obtain a global registration between a reference data set of the series and the set of image data; and a registration refinement circuit that, for each set of image data of the plurality of sets of image data:
performs a local registration process, to obtain a local registration between the reference data set of the series and the set of image data within the sub-region of interest determined by the segmentation process;obtains a combined registration based on the global registration and the local registration;applies the combined registration to the reference data set or to the set of image data to obtain a transformed reference data set or transformed set of image data; andperforms at least one of (a), (b) and (c) to obtain a subtracted, transformed set of image data:(a) subtracts the set of image data and the transformed reference data set;(b) subtracts the transformed set of image data and the reference data set; and(c) subtracts the transformed set of image data and a further reference data set.