File:Paragon X-ray pointers - a complete textbook on radiography with Paragon X-ray plates (1915) (14570916187).jpg

Identifier: paragonxraypoint00geor (find matches)
Title: Paragon X-ray pointers : a complete textbook on radiography with Paragon X-ray plates
Year: 1915 (1910s)
Authors: George W. Brady & Co. (Chicago, Ill.)
Subjects: Radiography X-rays Radiography
Publisher: Chicago, Ill. : George W. Brady & Co
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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gh,owing to the increased voltage required to drive through the heaviermilliamperage. This increased voltage increases the penetration in exactproportion. If it is not convenient to reduce the tube another tubeshould be substituted, or an extremely short exposure made with theheavy current in the fluoroscopic tube. A series of. radiographs is gen-erally made in order to trace the course of the Bismuth through theintestinal tract. The average stomach will empty itself in 6 hours andthe Bismuth will pass entirely through the tract in 24 hours. Occa-sionally cases will be found where the Bismuth will linger as long as 72hours. Such patients generally have chronic constipation, and the causemay be found by studying the plate. A penny or washer should beplaced on the navel in order to locate the stomach, and determine if itis in normal position. The plate should be examined closely for gallstones, as these occasionally show in abdominal radiographs where they Page 30 PARAGON X-RAY POINTERS
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Radiograph showing bismuth meal and colon injection. Exposure % secondon Paragon Plate without intensifying screen. Page 31 II Radiograph showing appendolith and appendix, with bismuth in colon. Takenin 34 second on Paragon Plate without intensifying screen. Page 32 PARAGON X-RAY POINTERS STOMACH are entirely unsuspected. Stomach radiographs can be made of theaverage patient on the regular Paragon Plate, the time of exposureranging from 1-5 to 1 second, depending on the apparatus used and thesize of the patient. Use a 6% backup spark and from 70 to 150milliamperes. Where faster work is required, or with a small ap-paratus, the Paragon Screen Plate should be used. The exposure givenwith the screen plate used with a good make of intensifying screen,should be about one-twelfth of the exposure required on the regularplate when used without screen. The regular plate can also be usedwith screen, and the exposure given in this case should be about one-fourth that given on the plate when used

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