Abstract
When patients undergo a magnetic resonance imaging scan, they aresubject to both strong static and temporal magnetic fields. The temporalfields are designed to vary at each point in the region being imaged. This isachieved by the use of gradient coils. However, when the gradient coils areswitched very rapidly, the strongly time-varying magnetic fields produced canbe responsible for stimulating nerves in the peripheral regions of the body.This paper gives a somewhat novel explanation for this phenomenon. Thephysical mechanism suggested is supported by an illustrative theoreticalcalculation.
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