The Collaborative International Dictionary of English v.0.48:

Fluoroscopy \Flu`or*os"co*py\, n.
   Examination of an object, as the human body, by exposing it
   to the X rays and observing the shadow cast upon a
   fluorescent screen; cryptoscopy.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

fluoroscopy
    n 1: examination of body structures using a fluoroscope

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "fluoroscopy":
   X-ray photometry, X-ray spectrometry, atom-tagging, curiescopy,
   orthodiagraphy, photofluorography, radiation physics, radiobiology,
   radiochemistry, radiography, radiological physics, radiology,
   radiometallography, radiometry, radiopathology, radioscopy,
   radiotechnology, radiotherapy, roentgenography, roentgenology,
   roentgenoscopy, spectroradiometry, tracer investigation