What happens during an MRI?

Hi, I'm Marcus. I'm a patient educator.

What happens during an MRI?

An MRI scan makes detailed pictures of the inside of the body using a powerful magnet and radio waves, not x-rays. A computer then turns these signals into clear pictures for a doctor to review.

Before the scan, a team member reviews safety questions about your health history. It is important to answer accurately and tell the team about any metal in your body, such as from an injury, a device or an implant. You remove all metal items like jewelry, glasses, and watches before entering the scan room. The strong magnet can attract metal objects, which makes this screening a key part of safety.

The MRI scanner is often a large machine shaped like a tunnel or a donut, with a table that slides into the center. You lie on this table for the exam. It is very important to stay still while the pictures are being made. Movement can make the images blurry.

While the machine is working, it makes loud noises. You might hear clicking, thumping, or humming sounds. These sounds are normal and are caused by parts of the scanner activating to capture the images. You are often given earplugs or headphones, and the team can see you and communicate with you.

The team explains what to expect before the scan begins, and this is a good time to ask questions. People often ask how to communicate with the team during the scan if they need to.

Call the hospital if you have questions about your visit or your care. This is general information, not personal instructions. Your own care team can tell you what applies to you.

Thanks for watching.