Method for automatic detection of artefacts in in vivo human brain MRI images

摘要

A method for detecting artefacts in single time-point in vivo MRI imaging data of human brain is proposed, whereby:- at least one in-vivo image is acquired by means of an MRI imaging apparatus,- a background image corresponding to the imaged air of said in-vivo image is obtained,- said background image is obtained in two steps, a first step comprising establishing of an object-air boundary, a second step consisting in an atlas-based refinement of a background volume of interest,- art histogram (H) that reflects an intensity distribution of the background image is obtained,- said background image consists of a set of voxels where artifacts are detected,- intensities above a definable intensity value (t1) provides an initial estimateof a range of artifacts intensities,- a modified morphological opening operation is executed, consisting in an erosion of a set of voxels and a dilation, performed iteratively and constrained to voxels intensity above the intensity value (t1) so that said opening operation provides natural definition of artefacts regions.