Patent ID: 8040133
Filing Date: 2011-10-18
Classification: G01R

Abstract:
1. A method for dynamic distortion correction of echo planar imaging (EPI) exposures in magnetic resonance imaging, comprising the steps of: operating a magnetic resonance data acquisition unit using an EPI sequence to acquire a plurality of images of an examination subject exhibiting movement that are adjacent to each other and that periodically alternatingly differ with regard to at least one characteristic selected from the group consisting of phase information, phase coding direction and echo time, said images exhibiting pixel distortion due to said movement; in a computerized processor, based on the periodically alternating difference, generating a plurality of continuously updated maps each selected from the group consisting of a field map and a displacement map for said adjacent images; and in said processor, dynamically correcting said pixel distortion by images from generating distortion-corrected said adjacent images using said maps, and making said distortion-corrected images available in electronic form at an output of said processor.