. The heart and the aorta; studies in clinical radiology . A A A A. Fig. 30 N NDDFig. 31 Fig. 30. DIAGRAM OF THE METHOD FOR FINDING THE INDEXOF DEPTH IN CASE OF HYPERTROPHY OF THE LEFT VENTRICLE AA, positions of the tube; NN, GG, projections of the normal ray andof the oblique ray. Fig. 31. SAME METHOD IN CASE OF ENLARGEMENT OF THERIGHT VENTRICLE AA, positions of the tube; NN, DD, projections of the normal rayand of the oblique. SHADOW OF HEART IN NORMAL STATE 57 It will be noted on the figure that it is not the depth ofthe apex which this method reveals, but the maximum ofsalience of the post
. The heart and the aorta; studies in clinical radiology . A A A A. Fig. 30 N NDDFig. 31 Fig. 30. DIAGRAM OF THE METHOD FOR FINDING THE INDEXOF DEPTH IN CASE OF HYPERTROPHY OF THE LEFT VENTRICLE AA, positions of the tube; NN, GG, projections of the normal ray andof the oblique ray. Fig. 31. SAME METHOD IN CASE OF ENLARGEMENT OF THERIGHT VENTRICLE AA, positions of the tube; NN, DD, projections of the normal rayand of the oblique. SHADOW OF HEART IN NORMAL STATE 57 It will be noted on the figure that it is not the depth ofthe apex which this method reveals, but the maximum ofsalience of the posterior contour of the heart, situatedbehind the apex and in the path of the oblique depth may be present outside of it. The processthen does not give the antero-posterior diameter of theheart, but valuable indications as to a point on the pos-terior surface of the organ. When the right ventricle alone is increased in volume,the result of the tube manipulation gives the following(Fig. 31, contours and lines black and dotted): The normal ray ends at D, t
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