MRI scan

An MRI (magnetic resonance imaging) scanner is a large machine with a short tunnel and a bed that moves you through it, and it produces detailed images of the inside of the body [1].

MRI scans are used to help diagnose conditions and to look at bones, organs and other tissues; they can also be used to monitor how a treatment is working, such as checking the size of a tumour during cancer treatment [1].

You will usually be asked to remove metal items such as jewellery, hearing aids and anything with zips, and to complete a safety questionnaire covering things like pregnancy, previous surgery, kidney problems, metal implants and allergies [1].

You lie still on the bed while the radiographer operates the scanner from another room. A scan can take from about 15 minutes to over an hour. The scanner makes loud banging and clicking noises, so you are given earplugs or headphones, and you may be asked to hold your breath briefly [1].

MRI is generally very safe and does not use X-rays. Because it uses a strong magnet, it is important to tell staff beforehand about any metal in your body — such as a pacemaker, surgical clips or certain implants. If you feel anxious or claustrophobic, tell the team, as support can be arranged [1].

A specialist doctor (radiologist) reviews the images and sends a report to the doctor who referred you. Results usually take a week or two, and your doctor will discuss them with you [1].