US 12,085,632 B2
MRI streak-artifact suppression, system and method
Sagar Mandava, Tucson, AZ (US); Maria I. Altbach, Tucson, AZ (US); Ali Bilgin, Tucson, AZ (US); Diego R. Martin, Tucson, AZ (US); and Mahesh Bharath Keerthivasan, Tucson, AZ (US)
Assigned to Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US)
Appl. No. 17/253,023
Filed by Arizona Board of Regents on Behalf of the University of Arizona, Tucson, AZ (US)
PCT Filed Jun. 19, 2019, PCT No. PCT/US2019/037933
§ 371(c)(1), (2) Date Dec. 16, 2020,
PCT Pub. No. WO2019/246222, PCT Pub. Date Dec. 26, 2019.
Claims priority of provisional application 62/687,102, filed on Jun. 19, 2018.
Prior Publication US 2021/0124005 A1, Apr. 29, 2021
Int. Cl. G01N 33/48 (2006.01); G01N 33/50 (2006.01); G01R 33/3415 (2006.01); G01R 33/36 (2006.01); G01R 33/565 (2006.01)
CPC G01R 33/56572 (2013.01) [G01R 33/3415 (2013.01); G01R 33/3664 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for producing a streak-suppressed magnetic resonance (MR) image of a subject comprising:
generating an interference covariance matrix R 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 of N coils of an MRI scanner, at least some of the MR signals originating in a first plurality of voxels of the subject corresponding to an artifact-region of a coil image corrupted by an artifact, coordinates (x, y) corresponding to locations within a cross-sectional plane of the subject;
for each of a plurality of subject-regions of the cross-sectional plane centered at a respective location (x, y), determining a coil weight vector W (x, y) from the interference covariance matrix R; and
generating the streak-suppressed MR image by combining a plurality of coil images using a weighted sum of the N coil images Ij(x, y), each weight of the weighted sum being W*j(x, y), a jth element of a complex conjugate of the coil weight vector W(x, y).