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Abstract #3871

Free-Breathing 3D Isotropic Whole Chest Non-Contrast MRA Using a Combination of Compressed Sensing, Parallel Imaging and a 3D Radial Phyllotaxis Trajectory: a Feasibility Study

Jian Xu 1,2 , Li Feng 3 , Ruth P. Lim 4 , Davide Piccini 5,6 , Ricardo Otazo 3 , Gabriele Bonanno 5 , Yi Wang 7 , 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, NY, United States, 3 Department of Radiology, New York University School of Medicine, NY, United States, 4 Department of Radiology, Austin Health, Victoria, Australia, 5 Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL) / Center for Biomedical Imaging (CIBM), Lausanne, Switzerland, 6 Advanced Clinical Imaging Technology, Siemens Healthcare IM BM PI, Lausanne, Switzerland, 7 The DeMatteis Center, St. Francis Hospital, Roslyn, NY, United States

This work demonstrates the feasibility of 3D isotropic whole chest non-contrast MRA in approximately 2 minutes using a joint multicoil compressed sensing reconstruction with a 3D radial phyllotaxis trajectory. Respiratory motion correction was implemented in k-space before image reconstruction to achieve 100% acquisition efficiency. The proposed approach offers potential applications for morphologic evaluation of the heart and thoracic vessels in clinically acceptable scan times. The high isotropic spatial resolution further enables simplified data acquisition and offline evaluation of the vessels in different planes with arbitrary image reformation. The method has additional potential applications in the diagnosis of congenital heart disease or aortopathy.

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