. Practical electro-therapeutics and X-ray therapy : with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of the X-ray . Fig. 194.—Location of foreign bodies. Piece of needle and artery forceps with which it was removed. 376 PRACTICAL ELECTRO-THERAPEUTICS AND X-RAY THERAPY though it is necessary to have a properly constructed table and tube-holder, so made that the tube may be moved either way past thecenter to a definitely fixed point. It is necessary to have a plate-holder, from which the first plate can be removed and another in-serted without dis
. Practical electro-therapeutics and X-ray therapy : with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of the X-ray . Fig. 194.—Location of foreign bodies. Piece of needle and artery forceps with which it was removed. 376 PRACTICAL ELECTRO-THERAPEUTICS AND X-RAY THERAPY though it is necessary to have a properly constructed table and tube-holder, so made that the tube may be moved either way past thecenter to a definitely fixed point. It is necessary to have a plate-holder, from which the first plate can be removed and another in-serted without disturbing the position of the patient. When theplates are developed, the distance between the shadow of the bulletand the shadow of the central wire is measured with a pair of di-viders. A simple calculation by means of a drawing will determinethe exact location of the bullet. Fig. 195 illustrates the method of making the exposures. Let A *. 20 TM. Fig. 195. -Method of making exposures for locating foreign bodies in the tissuesManipulating the plates. represent the plate-holder, with its removable plate H. B is theline along which the tube is moved in changing the angles to eitherside of the center C. D is the object to be skiagraphed. For thefirst exposure the tube is moved to E, 3 inches to the right of thecenter C. The exposed plate II is taken from the holder A and anew plate is put in its place. The tube is now moved to G alongthe line B, 3 inches to the left of the center C and 6 inches to theleft of the first exposure, where the second exposure is made. Thecentral wire on the plate-holder must be directly under the centerC on line B. When these two exposed plates are developed, theywill each show a shadow of the bullet and the central wire on the X-RAY IN LOCATION OF FOREIGN BODIES 377 plate-holder. Both shadows of the bullet may be on the right orleft side of the wire, or they may occupy almost the same positionover the
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Keywords: ., boo, bookcentury1900, bookdecade1910, booksubjecteye, bookyear1912
