. Radiography, x-ray therapeutics and radium therapy . Fig. 102.—Fragments of shrapnel iu baud. 122 EADIOGRAPHY attached to it a small scale with moving points, such as the Hampson,or one made by Watson and Sons. The tube is accurately centred andthe distance between the anti-cathode and the screen ascertained. Thepatient is prepared for operation and placed on the table. The bodyis then located on the screen, the skin being marked by a smallincision at a point corresponding to the shadow. The foreign bodylies just under this spot. The depth is ascertained by a displace-ment of the tube a. the
. Radiography, x-ray therapeutics and radium therapy . Fig. 102.—Fragments of shrapnel iu baud. 122 EADIOGRAPHY attached to it a small scale with moving points, such as the Hampson,or one made by Watson and Sons. The tube is accurately centred andthe distance between the anti-cathode and the screen ascertained. Thepatient is prepared for operation and placed on the table. The bodyis then located on the screen, the skin being marked by a smallincision at a point corresponding to the shadow. The foreign bodylies just under this spot. The depth is ascertained by a displace-ment of the tube a. the Fig. 103.—Arrangement of X-ray tul)e and fluorescent screen foraccurate localisation by screen or plate. known distance,scale on the screenautomatically record-ing the depth in cen-timetres. This read-ing should be com-pared with the resultobtained by the Mac-kenzie Davidsonmethod, and if theycorrespond the sur-geon has an accuratestatement of thedepth of the foreignbody. If owing tothe anatomical struc-tures interposed onthe hue of the bodyit is not possible tocut straight downinto it, it can m nearly every case befound by probing. Should the surgeon fail to find the body quickly,aimless probing should not be continued. The light of the room should beexcluded, the X-ray tube turned on, and the surgeon will at once be ableto see how far his instrument is from the foreign body and guide hisforceps to it. The length of time the operator is exposed to the rays need not be morethan a few seconds, but if many cases daily require to be screened, somemethod of protection must be employ
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1915
