File:The American journal of roentgenology, radium therapy and nuclear medicine (1906) (14777256843).jpg

Identifier: americanjournroen09ameruoft (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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The mirrors need only to be adjustedto make the images coincide. 5. Two persons may simultaneously ob-serve a true stereoscopic image. 6. The inclined position of the ground that this new type of stereoscope wasdesigned and used by Dr. James G. VanZwaluwenburg, but that his untimelydeath prevented him from bringing itbefore the profession. A NEW SAFETY DEVICE* BY H. W. VAN ALLEN, M.D. SPRINGFIELD, MASSACHUSETTS APPLICATION of x-ray, in the practiceof medicine, changes so rapidly thatmany customs and usages that were per-fectly safe only a short time ago have, dueto the increased efficiency of our presentday apparatus, become dangerous to adegree not always recognized. It is wellknown that a number of deaths have we began to use the auto transformercontrol. Provided the patient had a goodground connection and the secondarycurrent passed through a vital part of thebody, death would be very apt to occur. At the recent Washington meetingmany safeguards were urged upon theroentgenologists.
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Position of circuit breaker after patient has pressedbulb—no current passing. I wish to present to you, to-night, anadditional device, which, while it is simple,is effective in stopping at once the continu-ance of the current, and places the controlof the high tension, in an emergency,in the hands of the patient as well as theoperator. At times the patient has anintimation of trouble before it actuallyoccurs, and the loss of time calling theattention of the operator might be fatal.I have, for a number of years, givenUp to this point, due to the tendency of patients a push-button connection with atherheostat not to allow large currents call-bell, instead of trusting to hearingto pass suddenly through it, we were still them speak, so that, if they are uncom-within safety. This was all changed when fortable, they can give the alarm in this • Read before The New England Roentgen Ray Society. Nov. 12. 1921 745 Position of circuit breaker when treatment is progress-ing—current passing

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