title: Assessment of patient exposure for barium enema examinations.
abstract: Methods are described for the assessment of patient exposure during clinical fluoroscopic procedures. Values of the roentgen-area-product (RAP) and their distribution throughout the examination are presented for both single-contrast and double-contrast barium enema studies. The double-contrast procedure was measured to give 50% more radiation to the patient than the single-contrast procedure when the same size optical aperture is used between the intensifier and TV pick-up tube. However, it was possible to decrease the fluoroscopic RAP value by over a factor of two for the double-contrast procedure without an adverse clinical effect by increasing the area of the aperture diaphragm.
mesh_terms: D001466:Barium Sulfate; D004733:Enema; D005471:Fluoroscopy; D006801:Humans; D007420:Intestine, Large / Q000000981:diagnostic imaging*; D008953:Models, Anatomic; D011829:Radiation Dosage
chemical_list: D001466:Barium Sulfate