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Abstract #0937

Feasibility of Free-Breathing Whole Heart Coronary MRA in Less Than 3 Minutes Using Combination of Compressed Sensing, Parallel Imaging and A 3D Radial Phyllotaxis Trajectory

Jian Xu 1,2 , Li Feng 3 , Davide Piccini 4,5 , Ricardo Otazo 3 , Gabriele Bonanno 5 , Florian Knoll 3 , Edward K. Wong 1 , and Daniel K. Sodickson 3

1 Department of Computer Science and Engineering, Polytechnic Insitute of New York University, Brooklyn, NY, United States, 2 Siemens Healthcare USA, New York, NY, United States, 3 Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University School of Medicine, New York, NY, United States, 4 Advanced Clinical Imaging Technology, Siemens Healthcare IM BM PI, Lausanne, Switzerland, 5 Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL) / Center for Biomedical Imaging (CIBM), Lausanne, Switzerland

The feasibility of rapid free-breathing coronary MRA with isotropic spatial resolution was demonstrated at different acceleration rates using a joint multicoil compressed sensing reconstruction (Sparse-SENSE) with a 3D radial phyllotaxis trajectory. Respiratory motion correction was implemented in radial k-space before reconstruction to achieve 100% acquisition efficiency. Results with adequate image quality can be achieved by using data acquired in only 144 heartbeats, which corresponds to a total acquisition time of approximately 2 minutes. The proposed method can be a potentially useful tool for free-breathing coronary MRA in clinically acceptable scan times.

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