Preparing for your first MRI? Key precautions to keep in mind

If you’ve been scheduled for an MRI, it’s normal to feel a little nervous, especially if it’s your first time. The good news: an MRI is a safe, noninvasive test that uses a strong magnet and radio waves to create detailed images of the body. Unlike X-rays or CT scans, it doesn’t expose you to radiation. With a little preparation, the process can feel smoother and less intimidating. Here’s what you need to know before stepping into the scanner.

Always let your care team know if you have a pacemaker, cochlear implant, surgical clips, metal fragments, or any other medical device. Because MRI relies on a powerful magnet, these can interfere with the test or require extra safety steps.

Always let your care team know if you have a pacemaker, cochlear implant, surgical clips, metal fragments, or any other medical device. Because MRI relies on a powerful magnet, these can interfere with the test or require extra safety steps.

Feeling uneasy about lying in the scanner? You’re not alone. If you struggle with claustrophobia or anxiety, let your doctor or technician know in advance. Options such as light sedation, calming features, or simply ongoing communication with the technologist during the scan can make a big difference.

Most MRI exams don’t require you to stop eating or drinking. But if you’re scheduled for a contrast-enhanced scan of the abdomen or pelvis, you may need to fast for four to six hours beforehand. Your imaging center will confirm the details when you book.

If you’ve had previous MRIs, CT scans, or X-rays, take them with you. Comparing past and present images helps doctors spot even the smallest changes more accurately.

Choose simple, metal-free clothing, no zippers, hooks, metallic threads, or underwire bras. If that’s tricky, you’ll be given a gown. Jewelry, piercings, belts, wallets, phones, and hearing aids should be left at home, as everything metallic must be removed before the scan.

An MRI machine looks like a large, tube-shaped tunnel that’s open at both ends. The test usually lasts 15–45 minutes, depending on what’s being scanned. You’ll need to lie still for clear images, but you’ll be given earplugs or headphones since the machine makes loud tapping noises. Some centers even let you listen to music or watch a show to pass the time.
You might also receive contrast dye through an IV to enhance image clarity, especially when evaluating blood vessels, tissues, or possible tumors.