What happens during an MRI scan?

I had an mri scan last year I may have some of the principals of it wrong- but I will give it a shot. what happens is the big machine produces sound waves of varying frequency to create a picture of your soft tissue. I believe that there is also a magnetic field that is created at the same time. it was very loud and annoying- they gave me a headset so that I could listen to music. I believe my arms were in the machine for about 40 minutes or so. I did not have to be naked during my MRI- if it is your head that they are going to scan, I don’t see why you would have to strip down and wear a gown. and yes- you are not allowed to have any metal on your person while the scan is taking place. they will probably not give you headphones- since they contain magnets and metal. I only had to get my wrists scanned- so things will most likely be different for you. you will probably get earplugs, I would think, since the machine is pretty loud. well have fun. hope this answers your question. I believe I answered correctly.