Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14735141546)

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



Text Appearing Before Image:
\ / A \ / / / / i.EYE.^-. 7 c Fig. 112. X ^^\ R.EYE 235 236 ELECTEO-THEEAPEUTICS. exposing one-half the plate, the other half is brought beneath the part,the latter having been previously shielded by a lead screen. The tubeis moved a suitable distance, and a second exposure is made. The
Text Appearing After Image:
Tig. 113.—Authors plate-changing box. two pictures thus lie side by side upon the same plate, and may becopied in a reduced size, and viewed as positives on glass or paper in arefracting stereoscope. This method is suited for the extremities, butnot for the chest, abdomen, etc. Marie and Eibaut^ have derived the following formulae and table,which they assert will give the most relief and perspective view withoutfatiguing the operators eyes. They arrived at these deduced results bya series of experiments founded upon mathematical proofs: A Maximum = The maximum displacement of focus tube. D = The distance of the tube from the surface of the object.P = The thickness of the object.B (D + P) A Max. = 50 P * Archives delectricite medicale experimentales et cliniques, viii., July 15, 1905,and Traite Radiologie Medicale by Bouchard, pp. 565 and 566. THE PEINCIPLES OF TECHNIC. 237 THien the actual size (dimension) is desired, then /\ is equal to 6.6cm.—viz., the distance between two pupil