Not for emergencies. Call 911 for any urgent symptom. DOD is not an emergency service.
Open MRI: What Patients Should Know
An open MRI uses a more physically open scanner design compared to standard closed-bore MRI tunnels. Open MRI scanners typically operate at lower magnetic field strengths, which may affect image quality. They may be an option for patients with severe claustrophobia who cannot tolerate standard MRI environments.
Educational content only. Whether open MRI is clinically appropriate and sufficient for any specific diagnostic question is determined by a licensed provider and radiologist. DOD does not operate MRI equipment or interpret results.
Quick Answer
Open MRI scanners have a more accessible physical design — with open sides or a much wider bore — compared to traditional closed-tunnel MRI. They typically use lower magnetic field strengths (0.3T–1.0T), which may result in lower image resolution compared to 1.5T or 3T systems. Open MRI may be considered for patients with claustrophobia or those who cannot fit in standard scanners. Provider orders are required. DOD can review open MRI order requests for eligible patients in supported states.
Open MRI vs. Standard Closed-Bore MRI
Standard Closed-Bore MRI
- Higher field strength (1.5T or 3T)
- Higher image resolution and faster scan times
- More restricted physical space — tunnel design
- Can feel claustrophobic for some patients
- May accommodate most patient sizes up to certain weight limits
Open MRI
- Lower field strength (0.3T–1.0T typically)
- More open physical design — may reduce claustrophobia
- Generally lower image resolution than standard 1.5T/3T
- May have longer scan times due to lower signal
- Not available at all imaging facilities
Note: "Wide-bore" MRI (typically 70cm bore at 1.5T or 3T) is different from traditional open MRI and may provide higher image quality while still offering more space. Patients should ask the imaging facility what type of scanner they use.
Frequently Asked Questions — Open MRI
Sources
- MRI — Patient Information — RadiologyInfo.org (ACR / RSNA)
- MRI Safety — FDA — FDA
Related Education and Order Pages
Need a Provider Review for an Open MRI Order?
$40 virtual provider review. Orders issued only when medically appropriate.
Start Virtual Consult — $40Not for emergencies. Orders not guaranteed.
Educational content only. DOD does not perform or interpret MRI. Facility and scanner selection is the patient's responsibility.