Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14755046321)

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:
Fig. 168.—Outline drawing of radiograph, tube belowthe plane of indicators. A, ball below centre of the cornea ;-B, external ball; ,S, foreign body. (Two-thirds normal size.) 288 ELECTEO-THEEAPEUTICS. above the external ball on the diagram representing the horizontalsection of the eyeball. A line drawn from K through the centreball gives the direction of the rays at the time the radiograph wasmade. On the same negative is measured the distance that the shadowof the foreign body is back of the shadow of each of the indicators, andthese distances, B J and A H, are entered on the diagram. A line isdrawn through the points J and H, and since this line represents theplane of the shadow of the foreign body, the point at which a perpen-dicular drawn from the situation of metal as shown on the vertical sec-tion of the eyeball intersects this line indicates the situation of the body Size of body by_ ^hy. Situation mm.
Text Appearing After Image:
miaijack of center ot cornea.min±ielQw horizontal plane. ram.to side of vertical plane. HoTizontatSECtion. Side viB^A/ Front view Trout view. Side VIEW Fig. 169.—Dr. William M. Sweets chart for plotting location of foreign bodies in the eye.(Two-thirds normal size.) back of the centre of the cornea. If the position of the tube from the eyehas been measured, its distance is indicated on the line drawn from Kthrough the centre ball A. A line through J to this point indicates thedivergence of the rays. This means of determining the position of theplane of shadow of the foreign body is more accurate than when themeasurement is made of the shadow of the body above each of the balls,and should be followed, especially if the body is some distance away fromthe anterior segment of the globe or is in the orbit. If the foreign body has passed into the orbit, the rotation of theeyeball to insure parallelism of the ocular axis with the plane of theplate leads to a slight error in the determinat