1.2.2 Electromagnets 
There are two categories can be used in MR scanner: Resistive and Superconducting 
Magnets 
1.2.2.1.Therefore, they produce a lot of heat, which requires 
significant cooling of the magnet coils.These magnets are very large that utilizes 
the principles of electromagnetism to generate the magnetic field, like the ones used 
in scrap yards to pick up cars.Resistive magnets are typically limited to 
maximum field strengths can be up to 0.6 Tesla.These 
superconductors, such as niobium-tin and niobium-titanium are used to make the 
coil windings for superconducting magnets.Resistive Magnets 
Resistive magnets are made from loops of wire wrapped around a cylinder through 
which a large electric current is passed.Once