MRI of the brain: how to do?
For a long time, studies of the pathologies of the brain were hampered by the lack of instruments to show an objective picture. After the invention of the MRI method, which gives accurate images of internal organs, medical diagnosis has taken a significant step forward. And what is a brain MRI, how does this examination?
MRI is Magnetic resonance imaging. During the examination using a powerful magnetic field, pulse radio frequency and computer receive the image. X-rays are not used in the device: this procedure is absolutely harmless.
The MRI device is a cylindrical tube surrounded by a circular magnet and a moving plane on which the patient lies. There are open-sided devices that are convenient for those who are overweight and claustrophobic.
Where do MRI of the brain? This is a very expensive equipment, so only large diagnostic centers have it.
Good image quality is obtained on tomographs with induction of a magnetic field of 1.0 Tesla. Inspection on devices with a lower field will be cheaper, but will not be of sufficient quality.
The procedure is as follows: the patient is placed on a moving plane, and the device is placed around the head. The peculiarity is that it is required to lie completely motionless. For fixing the body can use straps and pillows.
Sometimes it is necessary to introduce an image enhancing contrast agent into a vein.
MRI of the brain lasts about 45 minutes. Therefore, young children do anesthesia.
During the examination there is no discomfort. The patient may experience some heat in the area being examined.
After an MRI, there are no side effects. If they occur, then as a reaction to anesthesia (lack of coordination, nausea) or to a contrast agent (rare cases of allergy).
MRI of the brain can reveal:
- condition of the blood vessels of the brain;
- multiple sclerosis, other diseases of the nervous system;
- head bruises;
- disturbances or in the inner ear and in the work of the eyes.
- problems in the pituitary gland;
- abnormalities in the development of brain structures.
Knowing what a brain MRI is, how this procedure is done, remember about contraindications. They are the presence of prostheses with metal parts, implants, a pacemaker.