. 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 . 84 THE ROENTGEN RAYS IN MEDICINE AND SURGERY of the shadow and the shadows will be more sharply defined. If, on thecontrary, the object is distant from the screen, there will be consider-able difference between the two positions of the shadow, and the shad-. ows will be larger and less sharply defined. Figures 62 and 63 illustratethis method. The screen is against the back of the chest and the tube(not shown in the cut) was placed in front of the
. 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 . 84 THE ROENTGEN RAYS IN MEDICINE AND SURGERY of the shadow and the shadows will be more sharply defined. If, on thecontrary, the object is distant from the screen, there will be consider-able difference between the two positions of the shadow, and the shad-. ows will be larger and less sharply defined. Figures 62 and 63 illustratethis method. The screen is against the back of the chest and the tube(not shown in the cut) was placed in front of the patient, 60 centimetres(2 feet) distant from the screen, and about as high as the shoulder when METHODS OF EXAMINATION 85 the lower of the two shadows was cast, and about on a level with theumbilicus when the higher was cast. The object in Fig. 62 is seen nearthe back of the chest and therefore the shadows are sharply definedand near together. In Fig. 63 the object is near the front of the chest,
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