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Abstract #0907

Abdominal Imaging at 0.05 T Using Golden-angle Radial Sampling

Yujiao Zhao1,2, Ye Ding1,2, Shi Su1,2, Jiahao Hu1,2, Junhao Zhang1,2, Alex T. L. Leong1,2, and Ed X. Wu1,2
1Laboratory of Biomedical Imaging and Signal Processing, The University of Hong Kong, Hong Kong, China, 2Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China

Synopsis

Keywords: Low-Field MRI, Low-Field MRI

Motivation: Subject physiological motions create artifacts in abdominal MRI, which can prevent identification of anatomical structures and lead to suboptimal diagnostic efficacy.

Goal(s): To demonstrate the feasibility of free-breathing abdominal MRI on a low-cost and shielding-free 0.05T whole-body MRI scanner.

Approach: 3D stack-of-star golden-angle radial sampling was implemented on a newly developed 0.05T whole-body MRI scanner. Typical abdominal and lung imaging were performed on healthy volunteers. The results were compared to those obtained using 3D cartesian sampling.

Results: 3D stack-of-star golden-angle radial sampling exhibited less sensitivity to subject motions, resulting in improved image quality compared with 3D cartesian sampling.

Impact: We demonstrate the feasibility of free-breathing abdominal MRI at 0.05T, potentially offering a low-cost, simplified and patient-friendly approach to visualize tissues and organs. The developments will facilitate ultra-low-field MRI in truly accessible and point-of-care clinical applications.

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Keywords