Just wondering. I have a friend going in to get a MRI done and today in class we were talking about Magnetic things and a MRI came up.
A large superconducting electromagnet
MRIs use electromagnets. That is. the magnetic fields are generated by pushing electrical current through HUGE copper coils. They usually use a Gadolinium (Gd) complex to aid in the imaging (There's a whole lot of atomic physics here that I don't want to get into details with) But more or less it aligns all of the nuclei in the Gd complex (and the tissue in your body) so they are spinning one direction. Once the field relaxes, they return to their normal spin states.
