What Happens During an MRI? A Minute-by-Minute Walkthrough
Fear of the unknown is the hardest part of any MRI. This is the whole visit, start to finish — what you will see, hear, and feel — so nothing in the scanner room surprises you.
An MRI scan has four phases: check-in and metal screening, positioning on the table, the scan itself (loud tapping and thumping sounds as you hold still), and a contrast injection partway through if your exam needs it. You can talk to the technologist through an intercom the entire time and stop the scan at any moment by squeezing the alert ball. Most single-body-part exams take 30–60 minutes.
What happens when I arrive for my MRI?
Plan to arrive about 30 minutes early. You will check in with photo ID and your referral, fill out a metal safety questionnaire, and change into a gown if your clothing has any metal. The technologist reviews your answers with you — this is the moment to mention implants, pregnancy, kidney issues, or claustrophobia. If your exam uses contrast, a small IV line goes into your arm or hand now.
How will I be positioned inside the scanner?
You lie on a padded table that slides slowly into the bore — the open-ended tube at the center of the magnet. Depending on the body part being scanned, you may go in head-first or feet-first. A device called a coil may be placed around the area of interest; it acts like an antenna for the signal. Foam pads and straps keep you comfortable and still.
The bore is open at both ends and never moves or tightens. If tight spaces worry you, our guide to MRI claustrophobia covers every comfort option.
What will I hear and feel during the scan?
The machine is loud — knocking, buzzing, and chirping sounds that change with each imaging sequence. This is normal; you get earplugs or headphones, and many facilities play music. The table may vibrate slightly. Some people feel mild warmth where the coil sits; padding prevents skin-to-skin contact that could heat.
Between sequences there are quiet gaps when nothing happens. The whole experience is painless for the overwhelming majority of patients.
What if I need contrast during the MRI?
If your exam includes contrast, the technologist injects gadolinium through your IV partway through the scan — you may feel a brief warm flush or metallic taste, which is expected. Then a few more sequences run so the radiologist can compare before-and-after images. The IV comes out at the end, and drinking water afterward helps your kidneys clear the dye. See our guides on MRI contrast explained and contrast and kidney function for details.
How do I communicate with the team during the scan?
You are never out of contact. A microphone and speaker let you talk with the technologist, who watches you the entire time through a window. You hold an alert ball — squeeze it and the scan pauses immediately while they slide you out. Tell them about pain, burning, an itch, or anxiety as it happens; there is no need to endure anything silently.
What to tell the team before you go in
- Every implant, clip, or device — and bring your implant card if you have one
- Pregnancy or possibility of pregnancy
- Kidney disease, diabetes, or high blood pressure (matters for contrast)
- Any previous contrast reaction
- Claustrophobia, anxiety, or pain that could make holding still hard
MRI Day Readiness Checklist
Tick items off as you complete them — everything on this list makes the scan smoother:
Educational checklist. Your facility's written instructions always override a general checklist like this one.
Still wondering about a specific moment?
Ask our education team anything about the MRI process — free, no strings attached.
Contact SATMED HealthFrequently asked questions about the MRI experience
Is it normal for the MRI to be so loud?
Yes. The sounds come from rapidly switched magnetic gradients and vary with each sequence — knocking, buzzing, chirping. Earplugs or headphones are provided, and music is often available.
Will I feel anything during the MRI?
Mostly just sound and slight vibration. With contrast, a brief warm flush or metallic taste is common. Pain is not expected — report it immediately if you feel any.
Can the technologist hear me during the scan?
Yes. There is a two-way intercom, and the technologist watches you continuously. Squeeze the alert ball at any time to pause.
What happens if I move during the MRI?
Small movements blur images, and the technologist will re-run only the affected sequence — adding minutes, not a new scan. Squeeze the alert ball rather than shifting silently.
Does the table move during the scan?
The table slides you into position before the scan starts, and small movements between sequences reposition you slightly. You never move during an image itself.
How will I know when the MRI is almost done?
Ask the technologist — they will usually tell you how many sequences remain. When the table slides back out and the IV comes off, you are done.
How SATMED Health makes contrast imaging safer
If your exam includes contrast, the delivery equipment matters as much as the scanner. SATMED Health engineers the systems behind every injection.
Contrast injector systems built for controlled, consistent delivery — the right dose at the right moment, every time.
Learn more →Engineered syringes for smooth, low-pressure injections that reduce discomfort and protect the vessel at the IV site.
Learn more →Patient lines and accessories designed for safe, reliable contrast administration from injector to vein.
Learn more →Contrast management solutions that help departments prepare, verify, and track every dose before it reaches a patient.
Learn more →Keep reading
More free, clinician-reviewed guides from SATMED Health.
Sources
- RadiologyInfo.org (ACR · RSNA · ASRT). How to Prepare for Your MRI Exam. Reviewed June 15, 2026.
- RadiologyInfo.org (ACR · RSNA · ASRT). MRI Safety.
- MedlinePlus (NIH). MRI — patient health encyclopedia.
- American College of Radiology. ACR Accredited Facilities Database.
Walk in knowing exactly what comes next
Browse more free, clinician-reviewed imaging guides from SATMED Health.
Contact SATMED HealthMedical disclaimer: This article is for education only and is not medical advice, diagnosis, or treatment. Always follow the instructions of your imaging facility and your own physician. If you think you are having an emergency, call 911 (or your local emergency number) immediately.
Please note: SATMED Health is not a medical facility. Please contact your physician with specific medical questions or for a referral to a radiologist. To locate an accredited medical imaging provider in your community, search the ACR accredited facilities database. This website does not provide cost information; imaging costs vary by region.
