Does an MRI use radiation?

No. Unlike CT scans and X-rays, an MRI does not use ionizing radiation.

An MRI (magnetic resonance imaging) creates its images using a powerful magnet and radio waves. The machine takes pictures of your body in slices, which are combined into detailed images that can show places where there may be tumors.

Sometimes a contrast dye is injected into a vein to make tumors show up more brightly. Your care team can explain whether you need it.