公开(公告)号：US12085632B2

公开(公告)日：2024-09-10

申请号：US17253023

申请日：2019-06-19

申请人： Arizona Board of Regents on Behalf of the University of Arizona

发明人： Sagar Mandava ,  Maria I. Altbach ,  Ali Bilgin ,  Diego R. Martin ,  Mahesh Bharath Keerthivasan

IPC分类号： G01N33/48 ,  G01N33/50 ,  G01R33/3415 ,  G01R33/36 ,  G01R33/565

CPC分类号： G01R33/56572 ,  G01R33/3415 ,  G01R33/3664

摘要： A method for producing a streak-suppressed magnetic resonance (MR) image of a subject includes generating an interference covariance matrix {circumflex over ( )}R front 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 of N 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 {circumflex over ( )}R. 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 jth element of a complex conjugate of coil weight vector W (x,y).

公开(公告)号：US20210124005A1

公开(公告)日：2021-04-29

申请号：US17253023

申请日：2019-06-19

申请人： Arizona Board of Regents on Behalf of the University of Arizona

发明人： Sagar Mandava ,  Maria I. Altbach ,  Ali Bilgin ,  Diego R. Martin ,  Mahesh Bharath Keerthivasan

IPC分类号： G01R33/565 ,  G01R33/3415 ,  G01R33/36

摘要： A method for producing a streak-suppressed magnetic resonance (MR) image of a subject includes generating an interference covariance matrix {circumflex over ( )}R front 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 of N 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 {circumflex over ( )}R. 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 jth element of a complex conjugate of coil weight vector W (x,y).