File:Radiography, x-ray therapeutics and radium therapy (1915) (14570898109).jpg

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Identifier: radiographyxrayt00knoxuoft (find matches)
Title: Radiography, x-ray therapeutics and radium therapy
Year: 1915 (1910s)
Authors: Knox, Robert, 1868-1928
Subjects: Radiography Radiotherapy X-rays
Publisher: London : A. & C. Black
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

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line of the skull can readily be determiiied by a method elabor-ated by Dr. R. W. A. Salmond and the author. A point is taken on thefront of the face correspondmg to the nasion, and a line is drauii from thispoint backwards through the external auditory meatus to the occipital bone,ending in the vicinity of the external occipital protuberance. From thisline as a base, other lines may be dra\Nai perpendicularly upwards at stated RADIOGKAPHY OF THE SKULL 125 intervals, and the skull divided into three or more sections, these perpendicu-lar lines being utilised as central points for the radiography of particularareas of the skull and face. The most useful lines are those drawn at the halfand third distances, or the whole line may be divided into thirds or quarters.It is hardly necessary in a work of this kind to describe variations of thisbase line, but for practical purposes several useful methods of localisationof areas of the skull will be described. For the examination of the mastoid
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Fig. 105.—Dr. M. Berrys chair for frontal sinuses, etc. The region a good technique has been described by Dr. Howard Pirie.following is the technique he recommends : Technique.—The patient should Ue prone on a firm couch. The head issupported on an incUned plane, making an angle of 25 degrees with the planeof the couch, as shown in Fig. 106. The photogi-aphic plate rests on thisincUned plane. The head is rotated 90 degrees so that the patient looks directlyto his side ; this brings the mastoid into contact with the plate. The pinna ofthe ear is turned forward, so as to obscure the mastoid as little as possible. Thesource of X-rays is placed vertically above the head, and the perpendicular rayis made to fall on a point 2 inches above the highest point of the pinna. Themastoid on each side must be skiagraphed separately. The glass of the focus tube should be 9 inches away from the hair. Theexposure required will turn a Sabouraud pastille placed at 2 centimetres fromthe glass to one-

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  • bookid:radiographyxrayt00knoxuoft
  • bookyear:1915
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Knox__Robert__1868_1928
  • booksubject:Radiography
  • booksubject:Radiotherapy
  • booksubject:X_rays
  • bookpublisher:London___A____C__Black
  • bookcontributor:Gerstein___University_of_Toronto
  • booksponsor:MSN
  • bookleafnumber:156
  • bookcollection:gerstein
  • bookcollection:toronto
  • bookcollection:medicalheritagelibrary
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27 July 2014

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