What should you know about an MRI scanner?

You lie on a movable table that slides into a short tunnel in the scanner. Coils placed around the body part help capture the signal. The machine makes loud knocking or buzzing sounds, so the imaging team provides hearing protection. Staying still is essential; some examinations also ask you to hold your breath briefly. An intercom and an alarm button let you communicate with staff.

Some scans use an injected contrast agent to make certain tissues easier to distinguish. MRI safety depends on metal and electronic devices, so the team must know about implants, clips, fragments, pumps, hearing devices, pregnancy, kidney problems, and previous contrast reactions. Staff will confirm whether each device is compatible before entering the scan room.

Complete the safety questionnaire accurately and remove jewellery, watches, cards, keys, and other metal items as instructed. Ask whether you should avoid food or drink and whether your medicines continue as usual. Wear clothing without metal fasteners when possible. If enclosed spaces make you anxious, tell the imaging team before the appointment so they can discuss practical support. Arrive early enough for screening and changing.

Tell staff immediately if you feel unwell during the scan, especially if you develop breathing difficulty, swelling, widespread itching, dizziness, or severe discomfort after contrast. After leaving, follow the instructions you were given and contact the imaging service about a delayed reaction or a problem at the injection site. Seek urgent care for severe breathing trouble, collapse, or rapidly worsening swelling.

Ask which body area will be scanned, whether contrast is planned, how long you should allow, whether eating restrictions apply, and when results will be discussed. Tell the team about implants and claustrophobia before the appointment.