Radiography, X-ray therapeutics and radium therapy (1916) (14571657340)
Summary
Identifier: radiographyxrayt00knox (find matches)
Title: Radiography, X-ray therapeutics and radium therapy
Year: 1916 (1910s)
Authors: Knox, Robert, 1868-1928
Subjects: Radiography Radiotherapy Radium
Publisher: New York : Macmillan
Contributing Library: University of California Libraries
Digitizing Sponsor: Internet Archive
Text Appearing Before Image:
y give an indicationof the position of the aneurism. Ashadow projecting to the right andlying nearer to the front than the back indicates an aneurism of the ascend-ing aorta, whereas a similar bulge to the left, and lying nearer the backthan the front, indicates the presence of an aneurism of the descendingaorta. There are other methods of detecting the position and origin of an aorticaneurism : (1) The tube may be moved from side to side or up and down. (2) The patient may be rotated, and observations made of the changein shape of the shadows as the patient moves. The size of the shadow asseen in the ordinary methods of examination is misleading, the distortioncaused by the nearness of the tube to the patient making the resultingshadows appear larger than they really are, the distortion being equal onall the structures recorded on the plate. If the exact size of the organs is required, then we must use orthodia-graphy or tele-rontgenography. The former consists of an accurate drawing
Text Appearing After Image:
PLATE XL.—Chests showing Aneurism and New Growth. a, Aneurism of descending aorta, lateral. 6, Same case antero-posterior position. c, Si jrowth in mediastinum, simulating aneurism. AORTIC ANEURISM 207 of the size of the heart and aorta on a paper in front of or behind the patient,a somewhat complicated mechanical device being necessary. This method isvery rarely used in this country, though it has been extensively used by
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