MRI STREAK-ARTIFACT SUPPRESSION, SYSTEM AND METHOD

摘要

A method for producing a streak-suppressed magnetic resonance (MR) image of a subject includes generating an interference covariance matrix R̂ from N coil images Ij (x,y), j = {1, 2,..., N}, each of the N coil images Ij (x,y) corresponding to MR signals detected by a respective one of a phased array ofN coils of an MRI scanner. The MR signals originate in voxels of the subject corresponding to an artifact-corrupted region of a coil image. Coordinates (x,y) correspond to a location within a cross-sectional plane of the subject. The method also includes, for subject-regions of cross-sectional plane centered at a respective location (x,y), determining a coil weight vector W (x,y) from R̂. The method also includes generating the streak-suppressed MR image as a weighted sum of the coil images Ij (x,y), each weight of the weighted sum being Wj* (x,y), a j^th element of a complex conjugate of coil weight vector W (x,y).