Abstract #2364

Efficient MRF at 0.55T with long readouts and concomitant field effects correction

Zhibo Zhu¹, Nam Gyun Lee², Ye Tian¹, and Krishna S. Nayak¹

¹Department Of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, United States, ²Department Of Biomedical Engineering, University of Southern California, Los Angeles, CA, United States

Synopsis

Keywords: MR Fingerprinting/Synthetic MR, BrainWe demonstrate FISP-MRF at 0.55T with improved efficiency using longer spiral readouts and concomitant field effect correction. 2D axial FISP-MRF is performed with 3 different readout durations and at 2 different off-isocenter locations, reconstructed without and with MaxGIRF concomitant field correction. Spatial blurring induced by concomitant field effect was successfully mitigated. In-vivo MRF white matter T₂ achieved tighter distribution with longer readouts, e.g., the coefficient of variation decreased from 9.9% to 4.9%.

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