General information, not an individual diagnosis. Ask a healthcare professional if you are unsure about your situation.
MRI does not use X-rays. For some clinical questions, the team may use a contrast agent, often gadolinium-based, to make particular structures easier to see. Not every MRI requires an injection.
When making the appointment, report any previous reaction to contrast, allergy or asthma, as well as kidney disease. The service checks the precautions appropriate for you; kidney disease can limit use of certain agents.
Also say if you are pregnant, think you may be pregnant or are breastfeeding. The team assesses the examination and any injection for your situation; do not decide on your own to cancel or postpone it.
MRI uses a powerful magnet. Report any metal or electronic material, implant or transdermal patch and any tattoo, and bring available documents: the service checks compatibility and precautions.
An acute reaction after contrast may appear suddenly as swelling of the face or throat, a change in voice, breathing difficulty, faintness, extreme weakness, fatigue or dizziness, or nausea, vomiting, diarrhoea or abdominal pain. During the examination alert the team immediately; afterwards call 15 or 112 in France. If a person with previous severe allergic reactions has their prescribed adrenaline auto-injector available, use it according to their instructions.
Ask the service for instructions specific to your examination, including your medicines, preparation and drinks after injection. If your usual fluid intake is restricted, mention this before following a general recommendation.
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