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Abstract #0561

MP-RAVE: IR-Prepared T1-Weighted Radial Stack-of-Stars 3D GRE Imaging with Retrospective Motion Correction

Eddy Solomon1, Houchun H. Hu2, Kai Tobias Block1, Daniel K. Sodickson1, and Hersh Chandarana1
1Radiology, New York University School of Medicine, New York, NY, United States, 2Radiology, Nationwide Children's Hospital, Columbus, OH, United States

Inversion-recovery 3D T1 gradient echo sequences are commonly used in brain examinations for their excellent gray-/white-matter contrast. However, prominent motion artifacts can arise during lengthy Cartesian k-space sampling (typically 5-7 minutes) if the patient is not able to hold still, as is often the case for pediatric or elderly patients. Here, we present an alternative based on radial stack-of-stars imaging and show that comparable image contrast can be achieved, with lower sensitivity to head motion. Moreover, we demonstrate how the radial acquisition scheme can be utilized for additional retrospective motion correction to further improve robustness without increasing acquisition time.

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