#radiography  photography that uses other kinds of radiation than visible light
  supertype:  #picture_taking__picturetaking__photography  the act of taking and printing photographs
  subtype:  #roentgenography__xrayphotography  radiography that uses X-rays to produce a roentgenogram
     subtype:  #angiography  roentgenographic examination of blood vessels after injection of a radiopaque contrast medium; produces an angiogram
     subtype:  #arthrography  roentgenographic examination of a joint after injection of radiopaque contrast medium; produces an arthrogram
        subtype:  #arteriography  roentgenographic examination of arteries
        subtype:  #venography  roentgenographic examination of veins
     subtype:  #cholangiography  roentgenographic examination of the bile ducts after a contrast medium has been injected
     subtype:  #encephalography  roentgenography of the brain after spinal fluid has been replaced by a gas (usually oxygen); produces an encephalogram
     subtype:  #myelography  roentgenography of the spinal cord to detect possible lesions (usually after injection of a contrast medium into the subarachnoid space)
     subtype:  #pyelography  roentgenography of the kidney and ureters (usually after injection with a radiopaque dye)
        subtype:  #intravenous_pyelography__intravenouspyelography__IVP  performing pyelography with intravenous injection of a contrast medium
  subtype:  #xeroradiography  radiography using X-rays and xerographic (rather than roentgenographic) techniques

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