L1-ESPIRiT Reconstruction for Accelerating 3D UTE and Denoising
Wenwen Jiang 1 , Frank Ong 2 , Roland Henry 3 , Michael Lustig 2 , and Peder E.Z. Larson 3
Bioengineering, UC Berkeley/UCSF, Berkeley,
CA - California, United States,
UC Berkeley, Berkeley, California, United States,
and Biomedical Imaging, UCSF, San Francisco, CA -
California, United States
Ultrashort echo time (UTE) imaging has shown promise for
imaging tissues with ultrashort T2 values. UTE with a 3D
radial trajectory requires π times the number of
phase-encodings as the Cartesian counterpart, requiring
long scan times. Practically, ~π times undersampling can
be used for acceleration without noticeable streak
aliasing artifacts with gridding reconstruction.
However, the undersampling-induced aliasing results in
noise-like artifacts. We propose using L1-ESPIRiT on 3D
UTE for effectively removing streak and noise-like
undersampling artifacts, and allowing for high
acceleration factors with robustness. The in vivo
applications for brain imaging shows the benefits of
L1-ESPIRiT for 3D UTE.
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