Design, construction and performance testing of a 1.5 T cryogen-free low-temperature superconductor whole-body MRI magnet

Yulin Wang, Sucong Wang, Ping Liang, Vladimir Brusic, Jie Zeng, Bingjian Liu, Yuwei Ge, Jianjun Zheng, Jingfeng Zhang, Chengbo Wang

Research output: Journal PublicationArticlepeer-review

3 Citations (Scopus)

Abstract

This work describes the design, construction and testing of a 1.5 T cryogen-free low-temperature superconductor niobium-titanium whole-body magnet with a bore diameter of 850 mm that is suitable for clinical magnetic resonance imaging (MRI) applications. The magnet is actively shielded and passively shimmed to achieve confinement within a 0.5 mT stray magnetic field at 2.5/4 m radial/axial positions and 12.1 ppm field inhomogeneity over a 45 mm diameter of spherical volume. The magnet is conductively refrigerated using a two-stage Gifford-McMahon cryocooler and can be maintained at a steady temperature below 5.7 K during MRI scanning. The MRI scanner assembled with the designed cryogen-free magnet demonstrated stable performance and provided MRI images with good quality and high contrast.

Original languageEnglish
Article number045002
JournalSuperconductor Science and Technology
Volume36
Issue number4
DOIs
Publication statusPublished - Apr 2023

Keywords

  • LTS
  • MRI
  • cryogen-free superconducting magnet

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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