When is an MRI scan recommended for a brain tumour?

MRI uses magnetic fields and radio waves to create detailed views of the brain. It may help show the tumour’s location, size, shape and relationship with nearby structures. Contrast dye may be suggested to make some areas easier to distinguish. The images support clinical assessment but do not, by themselves, confirm every tumour type.

Tell the imaging team about metal implants, a pacemaker, shrapnel, kidney problems, allergies, pregnancy or anxiety in enclosed spaces. Follow the appointment instructions about food, medicines and contrast. Bring earlier scans if requested, because comparing images can help identify change over time.

Seek emergency help for a first seizure, a seizure that does not stop, sudden weakness on one side, new trouble speaking, severe sudden headache, repeated vomiting with worsening drowsiness, or a rapid change in vision or alertness. These symptoms need prompt assessment regardless of whether an MRI is already scheduled.

Ask what the MRI is intended to answer, whether contrast is needed, how the result may affect biopsy or treatment planning, when the report is expected, and what symptoms should prompt urgent review.