MEDRADSC 2Z03 Lecture Notes - Lecture 14: Superconducting Wire, Liquid Helium, Faraday Cage
29 Jun 2016
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The mri magnet is housed in a specially constructed room. Other ancillary equipment may include power injectors for administration of contrast and physiological monitoring units. There are a number of features important to the operation and ancillary support of the magnet: Magnetic shielding: the stray magnetic field of modern actively shielded mri magnets is often sufficient to limit the 5 gauss line to rest entirely within the magnet room. However, for some magnets this may not be the case, and so the room may be encased in thick sheets of iron. The thickness required to contain the field is calculated by the magnet manufacturer, and ideally the shape of the room is symmetrical with respect to the magnet, so that the field within the bore is not affected significantly. An example of a magnet room shield design is shown below in figure 2.
