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File:The American journal of roentgenology, radium therapy and nuclear medicine (1906) (14570815248).jpg

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Identifier: americanjournroen07ameruoft (find matches)
Title: The American journal of roentgenology, radium therapy and nuclear medicine
Year: 1906 (1900s)
Authors: American Radium Society American Roentgen Ray Society
Subjects: Radiotherapy X-rays
Publisher: Springfield, Ill. C.C. Thomas
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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Fig. I. Showing Graininess of A-Ray Intensifying Screens; AIagnh ication, 9 Diameters. resulting negatives were examined with asmall magnifier. Individual screens werefound to vary considerably in excellence ofdefinition. Photomicrographs of some ofthese tests are shown in Fig. 2. The defini-tion of Dupli-Tized A-Ray film withoutscreen is by this test markedly superior tothe best screen definition. It should be bornein mind, however, that no scattering mediumwas interposed between tube and film. The200-mesh gauze is well suited to such defini-tion tests; the best intensifying screens showthe meshes cjuite distinctly, while withthe poorest screens, the meshes canscarcelv be distinguished. These testsshowed that somewhat better definition isobtained with a single screen than by thedouble combination; all the single screensexcept one were found better than anydouble screen combination. This factor ofdefinition is being investigated further andthe writer hopes to present at some futuretim

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  • bookid:americanjournroen07ameruoft
  • bookyear:1906
  • bookdecade:1900
  • bookcentury:1900
  • bookauthor:American_Radium_Society
  • bookauthor:American_Roentgen_Ray_Society
  • booksubject:Radiotherapy
  • booksubject:X_rays
  • bookpublisher:Springfield__Ill__C_C__Thomas
  • bookcontributor:Gerstein___University_of_Toronto
  • booksponsor:University_of_Toronto
  • bookleafnumber:213
  • bookcollection:gerstein
  • bookcollection:toronto
  • bookcollection:medicalheritagelibrary
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27 July 2014

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