#X-ray_tube  a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays
  supertype:  #thermionic_vacuum_tube__tube__vacuum_tube__thermionic_tube__electron_tube__thermionic_valve  electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
  part of:  #X-ray_machine  an apparatus that provides a source of X rays

No statement uses or specializes #X-ray_tube; click here to add one.