Basic Principles Of CT Scan

Instead of film, radiation detectors  measure the radiation attenuation as the beam passes through the body.

     The detectors are connected to a computer that uses algorithms to process the data into useful images that are then recorded on film and viewed on a computer monitor.

     

      Conventional tomography has the image parallel to the long axis of the body. This is referred to as Axial Tomography.


      Computed Tomography has the x-ray tube move across the so the image is called a transverse  image or one perpendicular to the long axis of the body.