Magnetic resonance imaging uses magnetism to align hydrogen atoms in the body in and out of phase. When they fall back into their natural alignment the difference is measured as a radio-frequency. This is used to build up a layered image of the body from the inside.

I was injected with a contrasting agent into the shoulder. I was given an anesthetic shot first before the contrasting fluid was injected. It made my shoulder very heavy and I was warned off using the arm in a strenuous manner for twenty-four hours. It is still a bit sore even now - the next morning.







