CT. Definition

Medical Definition: CT

Technical equipment and transverse tomographic imaging of a patient or object, based on crossing properties of matter and X-ray ionization Consists of an X-ray emitting tube, which rotates around the object or patient, confronted with an arc or ring of detectors. These are composed of small ionization chambers or ceramic materials, to detect and quantify the amount of radiation that has traversed the object at each point in turn. The data obtained are processed by a computer, calculating a dot matrix or Fourier transform. The value of each grid point is represented by a gray intensity, ranging from black and white, to generate an image. The numerical value of brightness is defined Hounsfield density units, ranging between 1000 and 1000, with 0 being the density for water.

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