a procedure followed in making a medical diagnosis

photography that uses other kinds of radiation than visible light

roentgenographic examination of blood vessels after injection of a radiopaque contrast medium; produces an angiogram

roentgenographic examination of a joint after injection of radiopaque contrast medium; produces an arthrogram

roentgenographic examination of the bile ducts after a contrast medium has been injected

roentgenography of the brain after spinal fluid has been replaced by a gas (usually oxygen); produces an encephalogram

roentgenography of the spinal cord to detect possible lesions (usually after injection of a contrast medium into the subarachnoid space)