The brief time allotted to me in this symposium permits only a hurried survey of the advanced data in lung skiascopy. The possession of an x-ray apparatus does no more in postulating a knowledge of skiascopy than the possession of a microscope, of microscopy. The errors perpetrated by the microscopist are no less grave than those of the skiascopist. Skill in the use of the Roentgen rays for purposes of diagnosis can only be attained by the elimination of errors and this requires much experience. One should be prepared at the outset of an examination to see nothing, so that the expectant mind does not transfer to the ocular sense a function which should be reserved for judgment. The x-rays have not supplanted the conventional physical signs of thoracic disease; on the contrary, the later signs have advanced in value since the advent of the former. It is
ABRAMS A. ROENTGEN RAYS INPULMONARY DISEASE.. JAMA. 1902;XXXVIII(18):1142–1147. doi:10.1001/jama.1902.62480180020001e
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