What should you know about fear of an MRI scanner?

An MRI scanner is a tunnel-shaped machine that makes loud knocking and humming sounds. You need to remain still while images are collected, and some examinations take longer than expected. Feeling anxious in an enclosed space, worrying about noise, or fearing loss of control can make the appointment harder. Telling the team early gives them time to adapt the plan.

The scanner does not use ionising radiation. The team can maintain contact through an intercom and can usually see and hear you throughout the examination. The exact arrangements depend on the centre and the type of MRI.

When booking, say that you are frightened or claustrophobic and ask what support is available. Ask whether a friend or family member may accompany you, whether music or ear protection is offered, and how you can signal the technologist. Practise slow breathing before the scan, choose comfortable clothing, and agree on a pause signal. If medicine to reduce anxiety is being considered, discuss it in advance and arrange safe transport if sedation is used.

Tell staff about metal implants, devices, previous surgery and any chance of pregnancy. Do not stop medicines without clinical advice.

Call before the appointment if you have previously stopped an MRI because of panic, cannot lie flat, or need help understanding implant safety. During the scan, use the agreed signal if anxiety becomes overwhelming, chest pain develops, you feel faint, or you cannot remain still. Urgent help is needed for severe breathing difficulty or collapse.

Ask how long the examination should take, whether your head or whole body will enter the scanner, what communication system is available, and whether an open or wider-bore option exists. Ask what preparation is needed if an anxiety medicine is prescribed.