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Abstract #3265

Free-breathing navigator 3D Cardiac Quantitative Susceptibility Mapping (QSM): initial experience at 1.5T and 3T.

Yan Wen1,2, Thanh Nguyen2, Pascal Spincemaille2, Jiwon Kim3, Jonathan W. Weinsaft3, and Yi Wang1,2

1Meinig School of Biomedical Engineering, Cornell University, New York, NY, United States, 2Radiology, Weill Cornell Medicine, New York, NY, United States, 3Medicine, Weill Cornell Medicine, New York, NY, United States

To improve signal-to-noise ratio (SNR) in cardiac QSM (cQSM), we introduce here 3D acquisition that is more SNR efficient than previous 2D acquisition. Respiratory motion artifacts during the long 3D acquisition are compensated using navigator gating. We also investigated potential SNR gain at 3T over previous 1.5T. Our initial results seem to suggest possible issues at 3T that prevent the realization of potential cQSM improvement at from 1.5T to 3T in terms of SNR and contrast.

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