. Röntgen ray diagnosis and therapy . te of comparison of the various diameters revealed the location ofthe bullet, which wasextracted under localanaesthesia. The bul-let, on account of hav-ing struck the bone,had assumed a flat-tened shape. For foreign bodieswhich can be seenbest in one directiononly, as, for instance,needles buried in thefoot or in the hand,Shenton (Guys Hos-pital, London) sug-gested the followingmethod: The surface of thepalm of the hand, forexample, is held in di-rect contact with thescreen, seeing that thescreen and anode inthe tube are as nearlyparallel as pos
. Röntgen ray diagnosis and therapy . te of comparison of the various diameters revealed the location ofthe bullet, which wasextracted under localanaesthesia. The bul-let, on account of hav-ing struck the bone,had assumed a flat-tened shape. For foreign bodieswhich can be seenbest in one directiononly, as, for instance,needles buried in thefoot or in the hand,Shenton (Guys Hos-pital, London) sug-gested the followingmethod: The surface of thepalm of the hand, forexample, is held in di-rect contact with thescreen, seeing that thescreen and anode inthe tube are as nearlyparallel as the needle andbones are seen dis-tinctly, sway the screen and hand from side to side and note thechange in relation of bones and needle. It is evident that theimage of whichever is farthest from you and from the surface ofthe screen will move the faster. If the needle moves across thebone, its position is deeper than the bone; if the bone moves acrossthe needle, the latters position must be between the surface andthe Fig. 36.—Localization of Bullet in the Armby Wire Letters. 56 THE RONTGEN EAYS Should the needle appear stationary, place a pointer againstthe image on the screen and ascertain whether it moved a little ornot at all. Verify these results by reversing the hand and repeat-ing the manoeuvres. A little practice enables one to give as nearan estimate of the needles real depth as any surgeon could require,and such suggestions as just beneath the skin of the palm/ lower and between bones/ upper end | of an inch betweenthe skin of the back of the hand are in my experience sufficientfor any operator. The needles depth being ascertained, it only remains to findits position in the horizontal planes—a task which represents fewdifficulties. When found, this position should be marked upon theskin. The advantages of this method are its rapidity of perform-ance, the process taking but a few seconds, and the economy of thematerial both photographic and electr
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