. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . of lead placed under the plate. The tubeis placed by means of a plumb-line as nearly as possible directly underthe right border of the superior brim of the pelvis, in the line of thepelvic axis, 3 centimetres to the right of the median line. If the tubeis at least 60 centimetres from the plate, and as nearly as possible justabove the point the position of which we wish to determine, the error inthe photograph will not be great. After the first exp
. The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students . of lead placed under the plate. The tubeis placed by means of a plumb-line as nearly as possible directly underthe right border of the superior brim of the pelvis, in the line of thepelvic axis, 3 centimetres to the right of the median line. If the tubeis at least 60 centimetres from the plate, and as nearly as possible justabove the point the position of which we wish to determine, the error inthe photograph will not be great. After the first exposure has beenmade and the left side of the pelvis is to be photographed, the sheetof lead is moved so as to cover the right half of the plate, and thetube is placed immediately over the left edge of the superior outlet ofthe pelvis, 3 centimetres to the left of the median line, its properposition being obtained, as before, by means of the plumb-line; the 1 Report of paper read before the Society for the Diffusion of Scientific Knowledge inVienna. British Medical Journal, 1899, Vol. II, Epitome, p. 85. ROENTGEN RAYS MEDICINE AND SURGERY l^Bv. CESOPHAGUS, ABDOMEN, AND PELVIS 381
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