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Abstract #1342

1.5 T whole-body superconducting MRI system with a conduction cooling design

Wenchen Wang1, Hui Wang2, and Feng Liu1
1University of Queensland, Brisbane, Australia, 2Institute of Electrical Engineering, CAS, Beijing, China

Synopsis

Keywords: Magnets (B0), Magnets (B0)

Motivation: Currently, helium-cooled superconducting MRI systems are expensive to operate, limiting their accessibility.

Goal(s): Develop a helium-free whole-body superconducting magnet that reduces manufacturing and operational costs, increasing accessibility and promoting the widespread adoption of MRI diagnostics.

Approach: Design, construct, test and evaluate a completely liquid helium-free 1.5T superconducting magnet. The new design employs the conduction cooling technology with a double-stage 418D GM cryocooler to achieve operating temperatures around 4.2K.

Results: The magnet is shimmed to achieve RMS field inhomogeneity of 4.3ppm over 450mm DSV, with a field stability of 3*10-8/h. The conduction-cooled magnet operates with a steady temperature below 4.2K, producing high-quality human images.

Impact: The developed conduction-cooled superconducting magnet technology will significantly impact the industry and broaden MRI applications.

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