A Free-Breathing Hybrid Technique for Simultaneous T2w, T1w, PDFF, and R2* Imaging at 0.55T
Mahesh Bharath Keerthivasan1, Mary Bruno2, Eddy Solomon3, Thomas Benkert4, David Grodzki4, Himanshu Bhat1, Kai Tobias Block2, and Hersh Chandarana2
1Siemens Medical Solutions USA, Malvern, PA, United States, 2Department of Radiology, New York University Grossman School of Medicine, New York, NY, United States, 3Department of Radiology, Weill Cornell Medical College, New York, NY, United States, 4Siemens Healthcare GmbH, Erlangen, Germany
Recently, there has been renewed interest in imaging at low field strengths. The increased T2* relaxation times at 0.55T and reduced chemical shift between fat and water requires the need for longer TEs for accurate fat fraction and R2* estimation, often resulting in longer acquisition times. In this work, we present a scan-efficient hybrid TSE-GRE technique for the simultaneous acquisition of T2- and T1-weighted images along with quantification of fat fraction and R2*. The use of a stack-of-stars trajectory allows SNR efficient free breathing imaging at 0.55T.
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