Zero-added-dose gastrointestinal film studies.
A technique is described to produce diagnostic quality 70 mm x 60 mm films of upper GI fluoroscopic examinations by photography of the video-displayed image on a "slave" monitor, obtained at a dose of 0.01 milligray (1 millirad) for a 20 cm water equivalent phantom. Because the photograph is the same image already being observed, the films require no added dose over that needed for an adequate fluoroscopic examination. Diagnostic films can be made from the replay of a videocassette recorder. With exposure times of 1/30th of a second, movement blur is easily prevented.
Department of Diagnostic Radiology, University of Western Ontario, London.
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Hamilton
D001466:Barium Sulfate; D004064:Digestive System / Q000000981:diagnostic imaging*; D005471:Fluoroscopy / Q000295:instrumentation / Q000379:methods; D006801:Humans; D010781:Photography / Q000295:instrumentation / Q000379:methods; D011829:Radiation Dosage; D013690:Television / Q000295:instrumentation / Q000379:methods
D001466:Barium Sulfate