If you’ve got an MRI coming up, you might be wondering how long you’ll be stuck inside that giant, humming machine. Is it a quick in-and-out, or should you bring a playlist and settle in? The truth is, how long an MRI takes depends on a few key factors—but it’s probably shorter than you think.
Let’s break it down so you know exactly what to expect when it’s your turn to lie still and let the magnets do their thing.
What Is an MRI, Anyway?
MRI stands for Magnetic Resonance Imaging. It’s a non-invasive scan that uses powerful magnets and radio waves to create detailed images of your body’s internal structures—especially soft tissues like your brain, muscles, and organs.
Unlike X-rays or CT scans, MRIs don’t use radiation. That’s one reason they’re often preferred for diagnosing things like joint injuries, brain conditions, or spinal issues.
So, How Long Does an MRI Take?
The short answer: most MRI scans take between 20 to 90 minutes, depending on what part of your body is being scanned and how detailed the images need to be.
Here’s a quick breakdown of average scan times:
Brain MRI: 30–60 minutes
Spine (Lumbar, Cervical): 30–60 minutes
Knee or Shoulder: 20–45 minutes
Abdomen or Pelvis: 45–75 minutes
Heart MRI: 60–90 minutes
Some newer machines use AI-assisted imaging software that can speed things up without sacrificing image quality.
What Affects the Duration?
Several things can influence how long your MRI takes:
Body Part Being Scanned: More complex areas (like the brain or heart) take longer.
Use of Contrast Dye: If your doctor orders a contrast-enhanced MRI, you’ll need extra time for the injection and additional scans.
Patient Movement: Staying still is key. If you move, the scan may need to be repeated.
Machine Type: Open MRIs (for claustrophobic patients) can take longer than traditional closed MRIs.
Image Detail: High-resolution scans take more time to capture.
What Happens During the Scan?
Here’s a step-by-step of what to expect:
Check-In & Prep: You’ll remove metal objects and change into a gown.
Positioning: A tech will help you lie on the table and may use cushions to keep you still.
Scan Time: The table slides into the machine. You’ll hear loud tapping or thumping—earplugs or headphones are usually provided.
Stay Still: This is the hard part. Even small movements can blur the images.
All Done: The table slides out, and you’re free to go unless contrast dye was used (in which case, you might be monitored briefly).
📌 Did You Know?
The first human MRI scan was performed in 1977. It took nearly five hours to complete! Today’s machines are much faster and more comfortable.
Common Questions About MRI Timing
Q: Can I leave the MRI early if I feel uncomfortable?
A: Yes, you can press a panic button at any time. But keep in mind, leaving early may mean rescheduling the scan.
Q: Does a faster scan mean lower quality?
A: Not necessarily. Some modern machines use advanced software to speed up the process while maintaining high-quality images.
Q: Will I get results right away?
A: Usually not. A radiologist will review the images and send a report to your doctor, which can take a few days.
A Quick Personal Take
The first time I had an MRI, I was nervous about being in the machine too long. But once I got in, the rhythmic sounds were oddly soothing—like a techno lullaby. I focused on my breathing, and before I knew it, the tech was sliding me out and saying, “All done!” It wasn’t nearly as bad as I’d imagined.
Whether it’s your first scan or your fifth, knowing how long an MRI takes can help ease some of the nerves. Most scans are over in under an hour, and the clarity they provide can be life-changing. Got questions or tips from your own MRI experience? Drop them in the comments—we’d love to hear.