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Are quenches dangerous?

P J Bore, G J Galloway, P Styles

    Magnetic Resonance in Medicine
    |February 1, 1986
    PubMed
    Summary
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    Quenching a superconducting magnet during an NMR exam poses minimal risk to subjects. An experiment with an anesthetized pig in a 1.6-T magnet confirmed these safety findings.

    Area of Science:

    • Medical Physics
    • Biomedical Engineering
    • Radiology

    Background:

    • Superconducting magnets are crucial for Magnetic Resonance Imaging (MRI) and Nuclear Magnetic Resonance (NMR) examinations.
    • The process of quenching, or rapid cooling, of superconducting magnets can generate significant forces and temperature changes.
    • Potential hazards to subjects within the magnet bore during a quench event are not fully understood.

    Purpose of the Study:

    • To assess the safety risks associated with quenching a superconducting magnet during an NMR examination.
    • To investigate the physical effects of a magnet quench on a biological subject.
    • To provide empirical data regarding the potential hazards to patients undergoing NMR procedures.

    Main Methods:

    • A 1.6-Tesla (T) whole-body superconducting magnet was intentionally quenched.

    Related Experiment Videos

  • An anesthetized pig was positioned within the magnet's bore during the quench.
  • Environmental and physical parameters were monitored throughout the experiment.

    • Main Results:

    • The quench of the 1.6-T magnet resulted in observable physical phenomena.
    • The anesthetized pig experienced the quench event within the magnet bore.
    • Experimental data indicated that the risks presented by the quench were limited under the tested conditions.

    Conclusions:

    • The findings suggest that quenching a superconducting magnet during an NMR examination presents minimal risk to subjects.
    • The experimental setup provided valuable insights into the safety of NMR procedures involving magnet quenches.
    • Further research may be warranted to confirm these findings across different magnet strengths and conditions.