. 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 . Fig. 393. Pleurisy with effusion on left side. The direction of the line indicating the upper portion of the shadow cast bymoderate amounts of pleuritic effusion varies with the quantity of fluid present inthe chest. APPENDIX 649 Sitting Position. — When the amount of effusion is moderate, the line is morenearly vertical than when the chest is nearly full of fluid. The preceding cut shows how fluoroscopic examinations may assist in distin-guishing
. 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 . Fig. 393. Pleurisy with effusion on left side. The direction of the line indicating the upper portion of the shadow cast bymoderate amounts of pleuritic effusion varies with the quantity of fluid present inthe chest. APPENDIX 649 Sitting Position. — When the amount of effusion is moderate, the line is morenearly vertical than when the chest is nearly full of fluid. The preceding cut shows how fluoroscopic examinations may assist in distin-guishing between fluid in the pleural sac and an increased density in the lung. The full line marked prone on the left side and the full vertical line parallelwith the line of the sternum indicate about the limits of the light area seen on thefluorescent screen when the patient was lying on his back; the line marked sitting and the vertical line of the same character, the limits of the light areawhen the patient was sitting and facing the observer squarely. The position ofthe light with reference to the patient was the same in both these examinatio
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