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Abstract #4447

3D RARE Radial xSPEN and Inverse Radon Transform based reconstruction for Single-Sided MRI

Riwei Jin1, Muller De Matos Gomes1, Meredith Sadinski1, Aleksander Nacev1, and William A Grissom2
1Promaxo, Oakland, CA, United States, 2Case Western Reserve University, Cleveland, OH, United States

Synopsis

Keywords: New Trajectories & Spatial Encoding Methods, Low-Field MRI

Motivation: Develop a spatiotemporal encoding method which can flexibly change FOV without aliasing in an inhomogeneous magnetic field for single sided MRI.

Goal(s): Develop a comprehensive protocol with a fully 3D, cross-term spatiotemporal encoding (xSPEN) pulse sequence and associated reconstruction for a single sided scanner with inhomogeneous B0 and B1 fields.

Approach: Use a RARE (Rapid Acquisition with Relaxation Enhancement) radial xSPEN sequence to rapidly collect profiles of the subject along in-plane angles and slices, and apply a radon-based inversion calculation for reconstruction.

Results: Images with no Fourier encoding were produced and could be reconstructed to a higher resolution without aliasing.

Impact: This method is applicable for 3D imaging in an inhomogeneous magnetic field at higher resolution compared to traditional Fourier encoding by cropping the FOV without aliasing.

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Keywords