. Radiography, X-ray therapeutics and radium therapy . Fig. 98.—Fracture of lower jaw ; foreign body in soft parts ;a portion of shrapnel above the jaw bone. over it. The tube is then moved and the second position of the foreignbody noted. It is then a matter of calculation to estimate the depth ofthe foreign body. Hampson does so by means of the graduated scale, Shenton by the use of the probewith a bulging point on it, andby placing the limb at rightangles to the position it occu-pied when the mark was placedover the foreign body. Localisation of Foreign Bodies in Deep Parts of the Body. — I
. Radiography, X-ray therapeutics and radium therapy . Fig. 98.—Fracture of lower jaw ; foreign body in soft parts ;a portion of shrapnel above the jaw bone. over it. The tube is then moved and the second position of the foreignbody noted. It is then a matter of calculation to estimate the depth ofthe foreign body. Hampson does so by means of the graduated scale, Shenton by the use of the probewith a bulging point on it, andby placing the limb at rightangles to the position it occu-pied when the mark was placedover the foreign body. Localisation of Foreign Bodies in Deep Parts of the Body. — In several of these regions the localisation of a foreign body is a matter of extreme difficulty, notably in the thorax abdomen, pelvis, axilla and region of the hip. The exact position may be marked out both stereoscopi- cally and by the Mackenzie Davidson method, and yet the necessity of t avoiding anatomical structures may render the subsequent removal difficult. In some cases it may be helpful to take a lateral view of the thorax or. Fig. 99.—Fragment of shell in region of hip-joint. FOREIGN BODIES IN THE LIMBS 121 spine. This may enable us to say at once where the foreign body lies
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