. The American journal of roentgenology, radium therapy and nuclear medicine . ry short time. In a certain forty-eight hours to reach the periphery number of instances, however, the patho- (Fig. 4). Whether of the slower, progres- 354 A Study of Lobar Pneumonia and Its Pulmonary Complications sive type, or the rapidly consolidatingform, the shadow produced is of a homo-geneous character, presenting an evendensity throughout, showing only denseperibronchial markings, which, at theonset of the process, are usually seenthrough the consolidation shadow. Thezone of ad\ance of the process is feather
. The American journal of roentgenology, radium therapy and nuclear medicine . ry short time. In a certain forty-eight hours to reach the periphery number of instances, however, the patho- (Fig. 4). Whether of the slower, progres- 354 A Study of Lobar Pneumonia and Its Pulmonary Complications sive type, or the rapidly consolidatingform, the shadow produced is of a homo-geneous character, presenting an evendensity throughout, showing only denseperibronchial markings, which, at theonset of the process, are usually seenthrough the consolidation shadow. Thezone of ad\ance of the process is featheryand uneven, and shades off into the normaltissue. The edge of the ad\ancing shadow the time of the crisis. Shortly afterthe crisis, resolution begins, and theshadow changes rapidly from the homo-geneous type to that of an uneven mottledappearance. Very soon the accentuatedperibronchial markings again become ap-parent, and the une\en mottled area givesplace to groups of soft isolated entire area may be o\ershadowed bya pleural haze if the pleura has become. Fig. 5. (i) Upper riulii lo|);ii- |iiuiiiiiMiii:i ^h(i\\in,>; rliShowing almost complete resol is composed of the radiating extension ofaccentuated peribronchial markings. Thisis probably due to the fact that the process,commencing in the hilus area, has pro-gressed more fully to dense consolidationthan that in the periphery, which is in-^■ol\■ecl 111 the later stage, and also becausethe amount of consolidated tissue obstruct-ing the ray is greater in the inner than inthe outer zone oi the lung. As the diseaseprogresses, and consolidation becomesmore dense, the peribronchial markingsbecome obliterated, and the entire shadowmay be of homogeneous density. In thenatural course oi the disease, little changeis seen :n the shadow Irom the timecomplete consolidation is reached until . sliadow. Philt iikkIl just before crisis. (2)ution in three days after crisis. thickened during the course of th
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