#tomograph  X-ray machine in which a computer builds a detailed image of a particular plane through an object from multiple X-ray measurements
  supertype:  #X-ray_machine  an apparatus that provides a source of X rays
  subtype:  #CAT_scanner__computerized_axial_tomography_scanner  a tomograph that constructs a 3-D model of an object by combining parallel planes
  subtype:  #positron_emission_tomography_scanner__PET_scanner  a tomograph that produces cross-sectional X-rays of metabolic processes in the body

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