Identifier: americanquarterl02amer (find matches)
Title: American quarterly of roentgenology
Year: 1909 (1900s)
Authors: American Roentgen Ray Society
Subjects: Nuclear Medicine Radiography Radiology Radiology
Publisher: Pittsburgh : American Roentgen Ray Society
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

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Trokoscope or Orthodiagraphic Examination Table of Dr. Foedor Haenish standard scale, ten units of which is the dose required to pro-duce a reaction of the skin. While this Quantimeter permitsof many technical errors, by careful attention to details it givesprobably the most delicate measure of dose yet invented, es-pecially for skin disease. In deep-seated disease, the personal Pfahler: European Roentgen Laboratories 21 skill of the operator, based upon previous experience, must bedepended upon until some other standard is established. In connection with this instrument should be mentioned theQuantimeter of Immelmann and Lepper, in which a photo-
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Application of the Trokoscope graphic plate is exposed in a developer and examined duringthe exposure. Likewise Schwarts Quantimeter which de-pends upon a precipitate produced in a solution by the actionof the rays ; and Holzknechts capsules containing a chemicalsubstance which changes color under the influence of the rays;and then the barium platino cynanide disks of Saborand andNoire, which turn yellow under the action of the rays. Third.—I would mention as new and unusual the Diaphragmof Lepper, which is constituted like an old fashioned water 22 American Quarterly of Roentgenology wheel. It is revolved around the tube and the spaces betweenthe paddles produce the diaphragm effect. This permits the ex-posure of a large plate, requiring, however, a correspondinglong exposure. Finally, I wish again to thank the men visited for theircourtesy, the result of which I have tried briefly to express.and I trust that this report may form a precedent for futurevisits of other Roentgenologis

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