File:American quarterly of roentgenology (1911) (14570277389).jpg

Identifier: americanquarterl03amer (find matches)
Title: American quarterly of roentgenology
Year: 1911 (1910s)
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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ound necessary to canythe stereoscope a little farther away from the plates than isusual, before a beginner can combine the images; but afterthe plastic picture is once seen, the observer returns to thenear view and is able thereafter to examine plates at any dis-tance desired. The long septum effectually prevents superim-posing the two images in all normal cases, and eight by tenplates may be correctly viewed from any point between sixinches and twelve feet (in the former position the end of theseptum will be in contact with the adjacent edges of theplates), but of course there is With every set of stereogramsa certain and predeterminate optical distance from which thepicture is best seen, depending, no doubt, upon the tube-platedistance of the original exposure. In viewing fourteen by sev-enteen inch plates it is usually necessary to go back six orseven feet, in order to properly see the whole of the platesat once, though adjacent portions of them may always beviewed at close range.
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Fig. 2Dr. Threlkeld-Edwards Stereoscope 200 American Quarterly of Roentgenology THE BROMIDE PAPER SCREEN TECHNIQUE. BY LEWIS GREGORY COLE, M. D., NEW YORK. While the use of bromide paper as a substitute for platesis not new, it having been used as long as ten years ago fordirect exposures of extremities, I do not know of its havingbeen used in conjunction with an intensifying screen for moredifficult work such as head, kidney, spine and gastro-intestinaltract. The manufacturer of an intensifying screen—practical-ly free from grain—revolutionized radiography. While itsgreatest application is in the gastro-intestinal radiography,it is not by any means limited to this region, and I am usingit, exclusive of lung radiography, more and more extensivelyfor other regions. The selection of different plates for various types of radio-graphy is being adopted by many radiologists. One kind ofplate is used where speed is an important factor and anotherwhere contrast and crispness are desired.

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