Reduction of Patient Exposure During Dental Radiography

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Abstract
Lithium fluoride thermoluminescence dosimeters have been employed to measure the radiation exposure of patients undergoing fullmouth roentgenographic examination at three different facilities. The patient exposure in the primary beam areas was 4.15 R for the facility employing slow film and X-ray machines operated at 65 kVp. Use of ultraspeed film and 90 kVp technique resulted in an average exposure of 0.792 R. The panographic examination of patients resulted in an average exposure of 0.027 R. The radiation exposure of anatomical sites outside the primary beam, such as the lens of the eye and the thyroid, was reduced to a lesser extent by the use of either ultraspeed film and high kVp technique or by the panographic examination compared to conventional slow film-low kVp techniques.

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