. A system of instruction in X-ray methods and medical uses of light, hot-air, vibration and high-frequency currents : a pictorial system of teaching by clinical instruction plates with explanatory text : a series of photographic clinics in standard uses of scientific therapeutic apparatus for surgical and medical practitioners : prepared especially for the post-graduate home study of surgeons, general physicians, dentists, dermatologists and specialists in the treatment of chronic diseases, and sanitarium practice . nches through. We have hereina method of measuring the density of a partial s
. A system of instruction in X-ray methods and medical uses of light, hot-air, vibration and high-frequency currents : a pictorial system of teaching by clinical instruction plates with explanatory text : a series of photographic clinics in standard uses of scientific therapeutic apparatus for surgical and medical practitioners : prepared especially for the post-graduate home study of surgeons, general physicians, dentists, dermatologists and specialists in the treatment of chronic diseases, and sanitarium practice . nches through. We have hereina method of measuring the density of a partial shadow by ascertain-ing how strong a known partial shadow it will obliterate. In theskiameter we have a series of partial shadows of known density. To measure any given pulmonary shadow, place the patientstanding before an active Crookes tube. Hold the fluoroscope againstthe chest as usual, and hold the skiameter against the opposite sideof the body. The Instruction Plates show the proper position oftube, skiameter, patient, fluoroscope, and examiner. (See Chapter xxxiy.) , The shadows of the skiametric-bars are thus made to fall throughthe thorax upon the fluoroscent screen and are superimposed upon the STUDIES m FLUOROSCOPIC TECHNICS 103 shadows of the chest. Note the weakest bar and the smallest hole dis-cernible in a given field. Compare the two sides of the chest. Passthe skiameter over the thorax in every position. If it is kept slightlymoving to and fro a closer reading may be made, because the eye will. Fig. 13.—The Skiameter of Crane. Directions for maimg the Skiameter. Lay down six strips of tin-foil side by side, parallel■with each other and separated by equal spaces. Make each strip and each space one cm. wideand ten inches long. Make the first strip of one layer of tin-foil, the second strip of twolayers, the third strip of three layers, the fourth strip of four layers, the fifth strip of fivelayers, and the sixth strip of but one layer for contrast. One cm. bel
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Keywords: ., bookcentury1900, bookdecade1900, bookidsystemofinst, bookyear1902
