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Towards Liquid-Helium-Free, Persistent-Mode MgB2 MRI Magnets: FBML Experience
1Francis Bitter Magnet Laboratory, Plasma Science and Fusion Center, Massachusetts Institute of Technology, 170 Albany Street, Cambridge MA 02139.
Superconductor Science & Technology
|March 24, 2018
Summary
Researchers developed liquid-helium-free, persistent-mode superconducting magnets using magnesium diboride (MgB2) for Magnetic Resonance Imaging (MRI). These advancements pave the way for more accessible and cost-effective MRI technologies.
Area of Science:
- Materials Science
- Superconductivity
- Medical Imaging
Background:
- Development of liquid-helium-free (LHe-free) magnets is crucial for advancing MRI technology.
- Early work focused on high-temperature superconductors (HTS) cooled by solid cryogens like solid nitrogen (SN2).
Purpose of the Study:
- To present experience with LHe-free, persistent-mode MgB2 MRI magnets.
- To explore the potential of MgB2 as a superconductor for MRI applications.
Main Methods:
- Review of LHe-free HTS magnet development using solid nitrogen.
- Design and construction of two MgB2 magnets (Magnet I and Magnet II).
- Focus on persistent-mode operation for MRI.
Main Results:
- Successful development of a 0.5-T/240-mm SN2-cooled MgB2 magnet (Magnet II) in persistent mode.
- Progress towards a 1.5-T/70-mm SN2-MgB2 "finger" MRI magnet for osteoporosis screening.
Conclusions:
- MgB2 shows promise for LHe-free, persistent-mode MRI magnets.
- Challenges and future prospects for MgB2 MRI magnet technology are discussed.
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