Patient Exposure During Fluoroscopy

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Abstract
An apparatus has been described which, when attached to the fluoroscope and calibrated, can be made to read within clinically acceptable limits the energy in square centimeter roentgens applied to the patient during a fluoroscopic session. If the quality of the beam is kept constant during the fluoroscopic session, the dose absorbed by the patient can be read directly in gram rads within clinically acceptable limits. The energy applied to and absorbed by patients during upper gastrointestinal studies, barium enema examinations, and other diagnostic procedures was measured. Experienced examiners using a 5-inch image intensifier gave, on the average, only about one-fourth to one-fifth as much radiation to the patient as did the less experienced examiners using a conventional fluoroscope for the same kind of examination. The more experienced examiners did their studies more quickly and with smaller field sizes. Comments are given about the square centimeter roentgen as a unit for patient-exposure.

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