Open MRI vs Closed MRI: Which Should You Choose?
For claustrophobic patients, larger bodies, or anxious children, the open MRI can be the difference between a completed scan and a cancelled one. But the choice has real trade-offs. Here they are, honestly.
A closed-bore (traditional) MRI offers the strongest magnet and sharpest images; an open MRI trades some image quality and speed for space and comfort around your body. For most routine exams, both produce diagnostic images — so if claustrophobia, body size, or anxiety is your barrier, the open or wide-bore option is often the right call. For detailed brain, cardiac, or small-structure studies, the closed scanner may still be recommended.
What is the difference between open and closed MRI?
A closed-bore MRI is the familiar tube — a cylindrical magnet surrounding you, typically 60 cm (about 24 inches) across. A wide-bore machine widens that opening to around 70 cm with a shorter tunnel. A true open MRI replaces the tube with two flat magnets above and below you, leaving three sides open. Each generation of openness gives up some field strength — the closed tube holds the strongest magnets.
Does an open MRI give worse images?
Not worse — different. Open machines typically run at lower field strength (often 0.5–1.2 Tesla versus 1.5–3 Tesla in closed systems), which means lower signal-to-noise and somewhat less detail, plus longer scan times. For many clinical questions — spine, joints, general soft-tissue work — modern open systems produce fully diagnostic images. For fine brain detail, spectroscopy, or advanced cardiac work, high-field closed systems still lead. Your radiologist matches machine to question.
Who should consider an open or wide-bore MRI?
- Claustrophobic patients — the single biggest reason; see our claustrophobia guide
- Larger bodies — open and wide-bore systems accommodate higher weights and sizes comfortably
- Children and anxious patients — a parent can hold a hand; some open units allow someone in the room
- Patients in pain who cannot lie in one constrained position for long
How do time and comfort compare?
| Factor | Closed / wide-bore | Open |
|---|---|---|
| Space around you | Narrow (wide-bore better) | Open on three sides |
| Typical field strength | 1.5–3 Tesla | 0.5–1.2 Tesla |
| Scan duration | 30–60 min | Often longer |
| Image sharpness | Highest | Good; less for fine detail |
| Noise | Loud | Generally quieter |
| Availability | Common | Less common; verify locally |
How do I choose — and what should I ask?
- Ask your doctor: does image quality for my specific question require high field?
- Ask the facility: what bore size and field strength is your scanner?
- If anxiety is the issue, ask about wide-bore plus comfort tools before accepting a lower-field open scan — or vice versa
- If cost differs, ask why and what changes
The best machine is the one that produces a diagnostic image of you — not of an ideal patient.
Try the Calm-Breathing Tool
Whatever machine you choose, two minutes of guided breathing before your appointment lowers anxiety measurably. Practice now:
Breathe in through your nose as the circle grows (4 counts), hold (4), and breathe out slowly as it shrinks (6). A relaxation exercise, not medical treatment.
Deciding between machines?
Ask us — and ask your radiologist which fits your specific scan.
Contact SATMED HealthFrequently asked questions about open vs closed MRI
Is an open MRI as accurate as a closed MRI?
For many routine exams, yes. For fine brain, cardiac, or micro-structure detail, high-field closed systems still produce sharper images. The clinical question decides.
What is a wide-bore MRI?
A middle ground: a conventional high-field magnet widened to about 70 cm with a shorter tunnel — most of the image quality, noticeably more space.
Will my insurance cover an open MRI?
Usually, when medically justified — claustrophobia documented by a failed prior attempt, body size, or a child's needs. Ask the facility to verify before booking.
Are open MRIs quieter?
Generally yes — lower field strength and different construction mean less acoustic noise, though ear protection is still provided.
Can I switch from closed to open after a failed attempt?
Absolutely — and it is common. Tell your doctor the closed scan was not completed; they can order the open study and document the reason for insurance.
Do open MRI scans take longer?
Often yes — lower signal requires more averaging time. Budget extra, and treat the longer, calmer exam as part of the comfort trade.
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). MRI Safety.
- RadiologyInfo.org (ACR · RSNA · ASRT). How to Prepare for Your MRI Exam. Reviewed June 15, 2026.
- MedlinePlus (NIH). MRI — patient health encyclopedia.
- American College of Radiology. ACR Accredited Facilities Database.
The best scan is the one you can complete
Browse more free imaging guides or reach out with any question.
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.
