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Abstract #0487

Lightweight and assembly-friendly single-sided permanent magnet array design based on Inward-outward (IO) ring units

Junqi YANG1, Ruian Qin1, Yifeng Jiang1, Zhongchao Zhou1, Anieyrudh R2, Shao Ying Huang2, and Wenwei Yu1,3
1Department of Medical Engineering, Chiba University, Chiba, Japan, 2Engineering Product Development Department, Singapore University of Technology and Design, Singapore University of Technology and Design, Singapore, Singapore, 3Center for Frontier Medical Engineering, Chiba University, Chiba, Japan

Synopsis

Keywords: Low-Field MRI, Low-Field MRI, Spatial encoding field, Evaluation method

Motivation: Lightweight MRI devices are constrained by a close form of magnet configurations, making it challenging to have a big imaging area using a compact size.

Goal(s): We aim to overcome the limitations of traditional closed magnet configurations by designing an open, lightweight single-sided magnet with a long imaging depth.

Approach: A high-performance array was designed by splitting a space into layers, categorizing IO ring units into different optimization groups, and selecting the first tier of performers.

Results: An easily assembled single-sided magnet array was designed, achieving a 49mT field strength in a 65mm depth while keeping the weight around 10kg (17kg with housing).

Impact: A novel, open, single-sided magnet array with 65mm imaging depth was designed through a design approach that breaks the limitations of traditional methods and optimize magnet configurations using different types of IO ring units.

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Keywords