Koninklijke Philips Corporation N.V.

Peter Roesch

Juergen Weese

Michael J Petrillo

Jürgen Weese

Angela Da Silva

method A first image of a moving object is acquired by of a first imaging method, e.g by PET or SPECT imaging. The first image contains artifacts caused by object motion. From two further images acquired by a second imaging method, e.g. C.T. or M.R., and representing the object in respective states of motion, a motion model is formed. The information contents of either the first image or a combination image, formed from the first image and the two further images, and the motion model is enhanced.

Motion artifact correction of tomographical images

The invention relates to a method of computing the transformation which transforms two different images (') of an object one into the other while describing the motion or deformation of the object. In accordance with the method first the local transformation parameters are computed for sub-regions (). By choosing the sub-regions so as to be sufficiently small, a rigid transformation can be used for this purpose. Starting from at least one first predetermined sub-region (), the local transformation parameters of the neighboring sub-regions () are successively computed, the starting values on which each computation is based being the already determined local transformation parameters of neighboring sub-regions. Using the local transformation parameters thus determined for sub-regions, the overall transformation can subsequently be computed.

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Aachen, Germany

Peter Roesch