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Abstract #1761

Stop-Motion RF for Improving Spatial Resolution in Non-Linear Gradient-Free Low-Field MRI

Anja Samardzija1, Kartiga Selvaganesan1, Younghyun Ha2, Zhehong Zhang1, Chenhao Sun2, Heng Sun1, Gigi Galiana2, and Todd Constable2
1Biomedical Engineering, Yale University, New Haven, CT, United States, 2Department of Radiology and Biomedical Imaging, Yale School of Medicine, New Haven, CT, United States

Synopsis

Keywords: Low-Field MRI, RF Arrays & SystemsWe developed a stop-motion imaging technique in which a 3x3 radiofrequency coil that transmits Bloch-Siegert encodings is placed in a different position within the field-of-view for each MR signal acquisition. This study is performed using a non-linear gradient-free low-field MRI system. High spatial resolution is achieved through stop-motion imaging. We show that stop-motion imaging done with a total of 200 encodings (20 imaging positions and 10 encodings per position) outperformed stationary imaging performed with 200 encodings (1 imaging position and 200 encodings per position).

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Keywords