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Updated: May 12, 2025
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Magnetic Resonance Imaging of Multiple Sclerosis at 7.0 Tesla
Published on: February 19, 2021
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Design and simulation of a 7.0 T conduction cooled superconducting magnet
Zhao Xu1, Hui Wang2, Zhichao Feng3
1School of Mechanical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Scientific Reports
|May 5, 2025
Summary
A novel conduction-cooled superconducting magnet (SM) for human MRI was designed using Nb3Sn coils. This 7T magnet achieves high field uniformity for advanced medical imaging applications.
Area of Science:
- Medical Imaging
- Superconducting Magnet Technology
- Materials Science
Background:
- Human magnetic resonance imaging (MRI) requires powerful and stable magnetic fields.
- Existing superconducting magnets often face challenges with cooling and field uniformity.
Purpose of the Study:
- To design a conduction-cooled superconducting magnet (SM) for human MRI.
- To achieve a 7 Tesla (T) central field strength with high magnetic field uniformity.
Main Methods:
- Utilized Nb3Sn superconducting coils and linear/nonlinear optimization for coil design.
- Incorporated a conduction cooling system with a Gifford-McMahon (G-M) cryocooler.
- Performed Finite Elements (FE) simulations for mechanical and thermal analysis.
Main Results:
- Designed an 850 mm warm bore magnet with a 7 T central field.
- Achieved 10 ppm magnetic field uniformity within a 400 mm diameter spherical volume (DSV).
- Validated stable and reliable low-temperature operation via FE simulations.
Conclusions:
- The designed superconducting magnet (SM) meets stringent requirements for human MRI.
- Conduction cooling ensures stable operation below 8 K.
- The magnet design is suitable for advanced medical imaging applications.
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