If a standard MRI tunnel feels too enclosed, there are roomier options. A wide-bore MRI is a standard-strength scanner with a larger opening, while an open MRI has a more open design with sides removed. Both help with claustrophobia and suit larger patients. The trade-off: some open scanners use a weaker magnet, which can mean lower image detail — so the best choice depends on the scan. Ask when you book, and know that sedation is also an option.
Key takeaways
- Wide-bore = standard strength, bigger opening; open = more open design.
- Both help with claustrophobia and larger body sizes.
- Some open scanners are lower-strength, which can reduce image detail.
- Raise claustrophobia when booking — sedation is also available.
The enclosed tunnel is the part of an MRI that puts people off — and for those who feel claustrophobic, it can be a real barrier. The good news: the classic narrow tube isn’t the only option.
Wide-bore vs open MRI
Two different designs help here, and they’re not the same thing:[1]
- Wide-bore MRI. This is a standard, full-strength scanner (usually 1.5T or 3T) with a larger opening — a wider tunnel. You still go inside, but there’s more room around you, which is often enough to ease claustrophobia. Because it keeps full magnet strength, image quality is excellent.
- Open MRI. This has a more open design, with the sides removed so you’re not surrounded by a tube. It feels the least confined and can be best for people with severe claustrophobia or a larger body size. The catch: many open scanners use a weaker magnet, which can mean less image detail, so they’re not ideal for every type of scan.
Which is right for you?
It depends on balancing comfort against image quality:
- For most people who feel a bit anxious, a wide-bore scanner (full strength, roomier) is the sweet spot — comfort without sacrificing detail.[1]
- For severe claustrophobia or where a standard scanner physically won’t fit, an open MRI may be the answer, accepting that some detailed scans may be better done another way.
- Your radiologist can advise whether an open scanner will give a good enough image for your particular scan.
Other ways to get through an MRI
Roomier scanners aren’t the only tool. Also worth knowing:[1]
- Mild sedation — about 1 in 20 people use it; you’ll need someone to drive you home.
- A support person in the room at some centres.
- Preparation and communication — knowing what to expect, plus the call button and intercom, is often enough on its own.
The key move is simple: tell the clinic when you book that enclosed spaces are difficult, so they can steer you to the right scanner or plan sedation — rather than discovering the problem on the day.
Frequently asked questions
Are open MRI images as good as a normal MRI?
Sometimes, but not always. Wide-bore scanners keep full strength and full image quality. Some open scanners are lower-strength, which can reduce detail — fine for many scans, less ideal for others. Your radiologist will advise for your specific scan.[1]
I’m claustrophobic — what should I do?
Say so when you book. The clinic can offer a wider or open scanner, arrange mild sedation, or take extra time to prepare you. Most claustrophobic patients complete their scan with the right support.[1]
Are open MRIs available in Australia?
Wide-bore scanners are common at Australian radiology practices, and some centres have open units. Availability varies by location, so ask a few clinics what they have if this matters to you.[2]
Sources
- RadiologyInfo.org (RSNA & ACR) — MRI Safety — www.radiologyinfo.org/en/info/safety-mr
- RANZCR / InsideRadiology — Magnetic resonance imaging (MRI) — www.insideradiology.com.au/mri-hp/
