. The American journal of roentgenology, radium therapy and nuclear medicine . adows indicatingtwenty to thirty years of age. The ladytook much offense when I informed herthat these plates belonged to another, andshe countered by showing me the posi-tion of the gastric ulcer which the roent-genologist (?) had indicated to her withpen and ink arrow. : _ This is but one of several more or lesssimilar instances which need not be • Read at the Midwinter Meeting of the American Roentgen Ray Society. Atlantic City. X. Tan. 26-28, 1922. 304 Standardization of X-Ray Exposure Identification detaile
. The American journal of roentgenology, radium therapy and nuclear medicine . adows indicatingtwenty to thirty years of age. The ladytook much offense when I informed herthat these plates belonged to another, andshe countered by showing me the posi-tion of the gastric ulcer which the roent-genologist (?) had indicated to her withpen and ink arrow. : _ This is but one of several more or lesssimilar instances which need not be • Read at the Midwinter Meeting of the American Roentgen Ray Society. Atlantic City. X. Tan. 26-28, 1922. 304 Standardization of X-Ray Exposure Identification detailed, in support of this presentation, thepurpose of which is to encourage the adop-tion of a standard identification which willprevent such intentional as well as unin-tentional assigning of plates to patients towhom they do not belong. The accidents of unintentional substitu-tion cannot be condoned, because of thesimple manner in which such happeningscan be easily avoided. Some roentgenworkers use a simple serial marker of NATIONAL PATH. LA 13. CHICAGO ;..I).. I. The significance of the sc\eial linos is detailedin the text; the sequence is optional but each line isof utmost importance. opaque figures, which is far better thannothing at all. But here, too, the chances oferror are still too high. It is true that when very few, say, one ortwo cases a day, are examined, the chancesof mistakes in identification of films aresmall, but if two cases of the same anatom-ical part are exposed on the same day, thepatients being approximately the same size,age, sex, etc., the chances for error aregreatly increased. The writer knows of aninstance in which this occurred: a renalstone was diagnosed and operated for inone patient, when it really was in thesecond patient; due to the exposures beingmixed up. Another factor in exposure identification is that of determining the right and leftside of the anatomical part cannot always be established when noidentifica
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