Abstract
A pinhole camera which simultaneously produces photographs and roentgenograms of any object which reflects light and emits secondary x-radiation has been described. Photographs and roentgenograms of a phantom's head, obtained with the pinhole camera and an x-ray machine, show the sources of secondary radiation which function when an examination of the patient's teeth is made by means of x-radiation. A method has been suggested for reducing the unnecessary exposure of both the patient and operator to scattered, secondary radiation.
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