The Roentgen rays have demonstrated their usefulness in diagnosis in all branches of medicine, and not the least in oral surgery. Without doubt many, if not all, physicians make use of it in all obscure cases. My object, therefore, is simply to show my methods of application of this agent in the diagnosis of true oral surgical conditions and to describe a little device which has been of great assistance to me in all kinds of Roentgen examinations, but particularly in this field.
A ROENTGEN TUBE FOCUS FINDER AND RAY LOCALIZER.
One of the difficulties encountered since the discovery of the Roentgen rays has been to determine the exact focus point on the anode of the tube. This is especially difficult with a new tube that has not had its focus point burned. The next difficulty, since the diaphragm technic has become practically universal, is to place this focus point
PFAHLER GE. THE ROENTGEN RAYS IN ORAL SURGERY.DESCRIPTION OF A ROENTGEN TUBE FOCUS FINDER AND LOCALIZER.. JAMA. 1908;L(6):432–433. doi:10.1001/jama.1908.25310320020001e
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