title: An analysis of dose efficiency in image intensified fluoroscopic examinations.
abstract: In this paper we have developed expressions for assessing radiographic systems where grids, air gaps, or both are used. The application of these expressions to film-screen detectors gives predictions in good agreement with data that are found in the literature. Using this analytical tool, image intensified fluoroscopy has been studied. We have shown that under certain circumstances with air gaps there are potential gains in the efficient use of dose in fluoroscopy. The air gaps are of particular value where relatively thin body parts or small lesions are being examined using small focal spot generators. An independent gain control on the image intensifier would be useful for achieving the greatest flexibility when using magnification in fluoroscopy.
mesh_terms: D005471:Fluoroscopy / Q000379:methods*; D006801:Humans; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000295:instrumentation; D013679:Technology, Radiologic; D014963:X-Ray Intensifying Screens