Method of reducing mr image artefacts in off-centre images, and device for performing the method

Abstract From the Canadian patent

Method of reducing MR image artefacts in off-centre images and device, for performing the method. A method is proposed for the elimination of the effect of coherent interference signals which give rise to image artefacts in offcentre imaging which usually requires roll correction in order to obtain a correct image. To this end, the image is shifted independently with respect to the artefact signal over an arbitrary distance which depends on the isocentric shift. The method is advantageous for offcentre imaging where usually surface coils are used. A band of interference signals in the phase encoding direction can thus be shifted to the edge of the image.