File:Radiography, x-ray therapeutics and radium therapy (1915) (14570973969).jpg

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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is undoubtedly the best. For this method, a well-protectedscreening stand, all the parts of which work with ease and smoothness, isnecessary. The particular form of stand varies with the desires of theoperator, but in order that good results may be obtained a good stand isessential. A convenient form is illustrated opposite. A few mmutes con-sideration of the mechanism will familiarise the operator with its move-ments, and it need not therefore be described. A rectangular diaphragm isbetter than one of the iiis shape, as with the rectangular form it is possibleto examine in detail the roots of the lungs in their entirety. The room should be completely darkened, not even a glimmer of lightbeing permissible when the tube is working. An open fireplace for heatingpurposes is not advisable, but if such is used, then efficient steps must betaken to exclude light from it durinsr the examination. It is also necessarvto enclose completely the X-ray tube and valve tubes in a box or in black 188
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PLATE XXXII.—Malignant Diseases of the Chkst. «, Secondary deposits of sarcoma in mediastinum and lungs. b, Lympho sarcoma of mediastinum, extending outwards from root of lung towards the periphery. c, Secondary deposits of cancer involving mediastinal glands, lung substance, and pleura ; thediaphragmatic surfaces of the right lung and the liver are also involved. EXAMIXATION OF THE THORAX 189 cloth, and even the front of the X-ray box must be covered with an opaquecloth, if reliable observations are to be made. These precautions taken, the operator should allow a few minutes toelapse in the darkened room before the current is allowed to pass throughthe tube, in order that the retina may become sensitive to the fluorescentappearance of the screen when the tube is working.

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