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Abstract #0670

Cancellation of streak artifacts using the interference null space (CACTUS) for radial abdominal imaging

Zhiyang Fu1,2, Maria I Altbach1,3, and Ali Bilgin1,2,3
1Department of Medical Imaging, University of Arizona, Tucson, AZ, United States, 2Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ, United States, 3Department of Biomedical Engineering, University of Arizona, Tucson, AZ, United States

In radial imaging, streaks due to gradient inhomogeneities can appear even when Nyquist criterion is fulfilled. Earlier techniques targeting this type of streaks remove coils contributing prominent streaks at the cost of signal loss. A phased array beamforming based technique (B-STAR), that can achieve a good trade-off between streak reduction and signal preservation, was proposed as a post-processing method. We propose CACTUS, an alternative technique for streak cancellation, which can be used either as a preprocessing method or with iterative reconstructions. In vivo abdominal experiments show enhanced image reconstructions and improved quantitative parameter maps.

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