Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14758135825)

Identifier: rntgenrayselectr00kass (find matches)
Title: Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy
Year: 1910 (1910s)
Authors: Kassabian, Mihran Krikor, 1870-1910
Subjects: Electrotherapeutics X-rays Phototherapy Radiology Radiotherapy
Publisher: Philadelphia & London : J.B. Lippincott Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School



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where a a are the direct rays from the anode. (See also Figs.192 and 193.) Dr. Henry Hulst^ states that the use of this diaphragm is most valu-able in the skiagraphy of renal, spinal, and pelvic conditions. Thus, incases of suspected renal calculi, the employment of the compression dia-phragm materially lessens the number of diaphragmatic movements ofthe patient, and as the kidney moves with each movement of the patientsdiaphragm, the steadiness of the kidney is markedly increased, in conse-quence of which, a skiagram of a renal calculus will not be blurred.^Transactions of the American Rontgen Ray Society, September, 1905. THE EONTGEN RAY APPARATUS. 193 The serious disadvantage of tlie compression diaphragm is the factthat only a very small area can be skiagraphed at one time, while thestone searched for may be located outside the part covered by the cylin-der. This method prevents a negative being taken of both sides for thesake of comparison ; a most necessary and invaluable guide.
Text Appearing After Image:
Fig. 98.—Ordinary diaphragm. Fig. 99.—Tubular or compressiondiaphragm. (Donath.) Although largely used in Europe and America, I do not advocatethe employment of a compression diaphragm, as, with greater refinementsin the technic, the time of exposure has been so materially lessened thatthere is a marked decrease of the secondary rays, and without thediaphragm a large area is exposed for examination on the plate. IV. The Selection and Installation of X-ray Apparatus.A. Selection or Choice. In equipping an X-ray laboratory several factors must be considered.The scope of the work, the portability of the instrument, the necessaryexpenditure that will be incurred, the requirements of the apparatus forthe of&ce, the city or country hospital, and the fact whether the purchaseris an X-ray specialist or a general practitioner. By the scope of work to be accomplished we mean the extent of use-fulness of an X-ray outfit. A small coil will suffice for the work that abeginner may be requir