How effective is MRI scan for brain tumour?

MRI uses magnetic fields to create detailed images of brain tissue. It can show a lesion's location, size, shape, relation to important structures, swelling, and changes over time. Contrast dye may make certain areas easier to assess, depending on your kidney health, allergies, and the scan question.

The images help clinicians plan a biopsy, surgery, radiotherapy, or monitoring. Appearance can suggest a diagnosis, but a biopsy may be needed to identify tumour cells and grade when that information will change treatment. Some scans show a finding that is not a tumour, so the report must be interpreted with symptoms and other tests.

Tell the imaging team about metal implants, a pacemaker, clips, shrapnel, kidney problems, previous contrast reactions, pregnancy, or severe claustrophobia. Remove metal objects and follow instructions about food, drink, and medicines.

The scanner is noisy and you need to keep still while images are taken. You can usually communicate with staff; ask beforehand about support or calming options if enclosed spaces are difficult. Arrange follow-up so a clinician can explain the report in context.

Seek urgent medical care for a first seizure, sudden weakness or difficulty speaking, rapidly worsening confusion, repeated vomiting with severe headache, loss of consciousness, or a severe headache that begins abruptly. After contrast, report rash, facial swelling, or breathing difficulty immediately.

What is the MRI intended to find? Will contrast be used? Does the scan show a tumour, swelling, or another condition? Is a biopsy needed? When will the radiologist's report be reviewed, and what is the next step?