Abstract
26 Without superconductivity, one of today’s most important medical imaging modalities would not be possible. Magnetic Resonance Imaging (MRI), which depends on being able to align the weak magnetic moment of the protons in a patient’s body with a magnetic field, requires the use of magnetic field strengths in excess of 1T. This can only be achieved practically through the use of superconducting electromagnets. The field strength generated by a current-carrying conductor can be calculated using Ampere’s Law. If the MRI magnet were a simple long solenoid with uniform winding density, this would reduce to:
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