- MRI Scan
- is a way of seeing a picture of the brain inside the skull, just like an x-ray.
- It allows you to see the structure of the brain and therefore whether there is damage or tumours that may need treatment.
- (1) The patient is placed in a large scanner, which passes a very strong magnetic field through their head.
- (2) The nuclei of some atoms in certain molecules spin a particular way when they fare placed in a magnet, which allows a detailed picture of the brain to be produced on a computer.
- (3) Electromagnetic waves are passed through the body by a magnet, and the nuclei in hydrogen molecules emit their own radio wave a frequency that the scanner picks up.
- (4) As hydrogen concentrations vary in areas of the brain, a detailed image of the brain at cross-sections can be seen