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Magnetic resonance imaging (MRI) of the brain is a safe and painless test that uses a magnetic field and radio waves to produce detailed images of the brain and the brain stem. An MRI differs from a CAT scan (also called a CT scan or a computed axial tomography scan) because it does not use radiation. An MRI scanner consists of a large doughnut-shaped magnet that often has a tunnel in the center.What can MRI tell us about the brain?
An MRI is a test that makes clear images of the brain without the use of X-rays. Instead, it uses a large magnet, radio waves, and a computer to produce these pictures. The scan can give doctors information about the structure of the brain and brain chemicals to help them find the cause of your headaches.What are the risks of a MRI brain scan?
Those atoms are then detected by the scanner. The greatest risk of an MRI is that any ferromagnetic metal implant can become a magnetic under the influence of the MRI and try to align pole-to-pole This can cause an implant to be displaced or overheated.How does MRI work on the brain?
The purpose of the MRI depends on what part of your body is being imaged. A special kind of MRI called a functional MRI (fMRI) checks brain activity by measuring blood flow to certain areas of your brain. An fMRI can show the active areas of your brain while you do a task.