Portable magnetic resonance imaging scanners for the brain

It uses a magnetic field and radiofrequency signals rather than ionising radiation. A portable system may help when moving someone to a conventional scanner is difficult, although it does not replace every standard MRI examination.

Portable refers to equipment that can be brought closer to the patient, including an intensive care area or ward. The scanner is generally smaller and may operate with a lower magnetic field than a fixed hospital MRI system. The patient’s head is positioned within the scanning unit while images are collected.

Clinicians may use these images to look for findings such as swelling, bleeding, fluid build-up, or a sizeable structural change. Whether the scan can answer a particular question depends on the device, the imaging sequence, movement during scanning, and the level of detail needed. A conventional MRI, CT scan, contrast-enhanced study, or another test may still be necessary.

Tell the imaging team about a pacemaker, implanted pump, aneurysm clip, hearing implant, metal fragment, surgical hardware, or any device attached to your body. Staff need the exact device information when possible because MRI compatibility differs between products. Remove metal objects when instructed, including jewellery, keys, removable hearing aids, and clothing with metal fasteners.

Let the team know if lying still is difficult, you feel anxious in enclosed spaces, or you cannot comfortably position your head. During the scan, follow instructions about movement and use hearing protection if it is offered. Ask what question the portable scan is intended to answer and whether further imaging may be needed if the result is unclear.

A scan should not delay urgent assessment. Call local emergency services for a new seizure, sudden weakness or numbness on one side, sudden trouble speaking, loss of consciousness, or a sudden severe headache. These symptoms need prompt clinical evaluation, and the care team will choose the imaging method that can answer the urgent question safely and quickly.

Seek timely medical advice for worsening headaches, repeated vomiting, new balance problems, progressive confusion, or a new change in vision. These symptoms have several possible causes; their pattern and severity guide the next step rather than the availability of a portable scanner.

You may want to ask: What clinical question are you trying to answer? Is this portable scanner suitable for that question? Will contrast be used? Could an implant or metal item affect my safety? Who will interpret the images? What happens if the images do not provide enough detail?