File:The American journal of roentgenology, radium therapy and nuclear medicine (1906) (14570333329).jpg

Identifier: americanjournroen06ameruoft (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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ced the Surgeon Generals Office toadopt a portable outfit having a sej^arategas-electric set. It was observed thatautomobile engines, not being constructedfor this kind of service, got out of ordervery frequently, not only interfering with Mobile Roentgen Ray Apparatus 361 the operation of the dynamo for roentgenray work, but resulting in frequent delayson the road due to motor trouble. After aheavily loaded truck has been driven aconsiderable distance, possibly over diffi-cult roads, time must be given to over-hauling the motor if it is to be kept ingood working order, and of course thiscannot be done if the motor is run con- tension transformer instead of the coil withthe troublesome interrupter, but alsoeUminates the synchronous motor andrevolving devices for rectifying the cur-rent. Fig. 7 shows the apparatus withoutthe gas engine, set up in connection withthe portable table. Actual practical workunder the difficult conditions of war hasdemonstrated that this is an entirely satis-
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FiG. 4. Eakliek Tvpe of French Roentgen Ray Camion. tinuously to operate roentgen ray appara-tus after arriving at its destination. An-other consideration is that accident to themotor on the road results in disabling theentire roentgen ray outfit, since it dependsvipon the automobile motor for its power.The portable apparatus adopted by themedical department is that developed byDr. W. D. Coolidge. It derives its greatadvantage over other portable apparatusfrom the use of a special radiator type ofCoolidge tube which rectifies its own cur-rent. It permits us not only to use a high factory portable outfit. It is true that themaximum output is only 10 milliamperes,but the very fine focus of the new radiatortube makes it possible to do perfectly satis-factory roentgenography of all parts of thebody. I will give no detailed description ofthe apparatus here since it has already beendescribed by Dr. Coolidge, and descriptionof its construction and operation will befound in the U. S. Army X-R

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