File:American X-ray journal (1897) (14754548444).jpg

Identifier: americanxrayjour1418unse (find matches)
Title: American X-ray journal
Year: 1899 (1890s)
Authors:
Subjects: X-Rays Radiography
Publisher: St. Louis : American X-Ray Publishing Co.
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
-RAY JOURNAL. 323 the resulting radiograph will be magni-fied and distorted. I use approximately the following dis-tances of tube from plate and time of ex-posure on a person weighing one hun-dred and fifty pounds: Hand and wrist, 30 seconds at 6 inches. Forearm, 45 seconds, at 6 inches. Arm above elbow, 1 minute, at 10 inches. Shoulder. 4 minutes, at 18 inches. Thorax, 3 1-2 minutes at 20 inches. Hip joint. 5 minutes, at 22 inches. Knee, 3 minutes, at 18 inches. Foot, 2 minutes, at 14 inches. erator to develop his own pictures; hewill naturally give them more care thana photographer. Very often a picturewhich is over or under exposed can bedeveloped carefully and a splendid pic-ture obtained. A photographer can tellyou your picture is under or over ex-posed, but it is impossible for him to ex-press to you just how much or to whatdegree, while if you are accustomed todeveloping yourself you can tell exactlyhow much it is under or over exposed inproportion to the length of exposure you
Text Appearing After Image:
FIG By using the above distances I getgood definition and still am not so faraway but what I can make a short expo-sure. I have been using about the abovedistances in all my work and have nev-er even produced a dermatitis or hadany bad results, although when I firstcommenced the work I had to makelong exposures, some as long as one-halfhour and several of these in a day. DEVELOPING X-RAY. It is a great advantage to an x-ray op- 4- have given it then you are sure of get-ting a correct exposure on the secondtrial; if your tube gives off the sameamount of rays and is placed at the samedistances as with the first exposure. In the choice of plates I always use aplate especially prepared for x-ray workwhich has a double thick emulsion on it.I have never seen any rules laid downfor developing these plates, but I spoiledmany a good picture by not continuingthe development long enough. 324 THE AMERICAN X-RAY JOURNAL. I use either of the following develop-ers: Pyro-Eikocum Hydro, or J. C. Tab-l

Note About Images