The CT comprises a set of radiological techniques that enable the body to see lots of little thickness to the exclusion of the rest. The device performs this process is called scanner or scanner. Rotates 180 degrees around the patient's body (found lying on a couch inside a cylindrical tube) while emitting a beam of x-ray A series of crystals located in certain places recorded lots of bones and tissues, the data are transmitted to a computer screen in which information is transformed into an image. This study is called a computed tomography (CT). Another important study is the positron emission tomography (PET) technique subsidiary of Nuclear Medicine. It is used to look at tissues inside the body and to detect strokes, brain tumors and other pathological processes. The patient is injected with isotopes and a complex physicochemical process certain information is obtained, which is transmitted to a computer and processed by it.
The first scanner was developed by electronics engineer Godfrey Hounsfield in 1972 on EMI. A similar device was designed by Allan Cormack, a member of the Tufts University in Massachusetts.