I've had 6 MRI's. Some offered foam ear plugs. The earlier one's did not. Now, they do have non-magnetic ear muffs. Many are offered anti-anxiety drugs to help with claustrophobia. If you do not struggle with claustrophobia, they would not normally offer drug assistance. Anesthesia is used for some, especially children who do not have the discipline to hold still.

It is extremely rare that an MRI will show anything from a concussion. Standard 1.5 to 3 Tesla hospital scanners have a spatial resolution of about 1 millimeter, covering about 10 000 neurons, and a time resolution of about a second.

It requires a 6 or 7 Tesla magnetic field to begin to see the anatomy of a concussion. It takes 10 Tesla to start to see the fine damage so that they can develop treatments and drugs from their observations. Those MRI scanners can cost $100 to $270 million dollars.