As soon as Computerized Tomography or CT became available in early 1970, which reformed the practice of neurology. They did scans using X-ray transmission flows all the way through the head in different positions and the accumulation of ordinary X-rays on the other side that was not absorbed by the head. A sequence of images come to view a computer monitor or on an x-ray as if he had cut his head from side to side by a huge salami cutter and cuts were arranged horizontally and in series.

After that, in the 1980 magnetic resonance imaging or MRI stepped in and stunned the medical society, not just taking a picture of the brain itself, but it's a new way. MRIs are concentrated in the water molecules as an alternative to images of the extent to which the various parts of the head absorbs x-rays To be more specific, MRI represents the rate at which hydrogen atoms broken water molecules in various parts of the brain or line or fall according to a powerful magnetic field. These different values ??de-magnetizing or magnetization are entering into a PC. Cut, as are the images in a sequence and set our sights on a computer screen or an X-ray film kind of shades of gray. irregular compositions, such as brain tumors or signs of MS are shown in their own shades of gray and are identified by their outlines and positions. More on this in http://www.medicalimagingdevices.info. Grab a different set of images after hypodermic injection of gadolinium, which is the equivalent MRI X-ray dye, also adds to the analytical.

For one patient, the incident of having a CT and MRI have a lot of it seems greatly. In both cases, the patient lies on a flat table that moves in and out of a hole in the scanner that looks a lot like a donut large. In the MRI machine the coverage is tighter, so patients who suffer from claustrophobia should notify your doctor if this could be a hitch. Noise is also a problem with the MRI machine. A loud noise is produced each time the radio frequency coils are turned off and on. For either of these two scans the technician may need to inject a needle into the vein of the patient to dispense a different substance.

A situation in which magnetic resonance imaging is not done, basically, is when the patient has a cardiac pacemaker. This is the reason that the magnet of the MRI machine could disturb and stop the heart pacemaker. No image is as essential and important that this risk is worth taking. Another situation in which a magnetic resonance escapes is when the patient is seriously ill. A critically ill patient can be effectively reviewed and sustained by obtaining a CT scan, but not to get an MRI.