Kaye, G. W. C. (George William Clarkson), 1880-1941 · London, New York [etc.] Longman's Green, and Co. · leaf 193
raysthat bismuth and other heavy metals emit, may actuallybe injurious. Stereoscopic Badiography. In this work, two distinct pictures are taken in turn bymoving the X-ray tube, between the exposures, 2 or 3 inchesparallel to the surface of the plate, the distance betweentube and subject being about… … Fio. 81.—Bismuth radiograph of the intestines. The blacii circular spotnear the centre of the picture is produced hy a metal disc which is placed onthe umbilicus as a landmark. diagnosis. There are other types of localisers, some of whichdisplay much ingenuity of design ; they can be found…
X-rays
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