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When the results of routine radiography are inconclusive, computed tomography is mandatory. A combination of pattern recognition with knowledge of the clinical setting is the best approach to the pulmonary infectious processes.<\/jats:p><jats:p>A specific pattern of involvement can suggest a likely diagnosis in many instances. In acquired immune deficiency syndrome patients, diffuse ground-glass and interstitial infiltrates are most commonly present in<jats:italic>Pneumocystis carinii<\/jats:italic>pneumonia whereas in the nonimmunosuppressed patients, a segmental lobar infiltrate is suggestive of a bacterial pneumonia. Round pneumonia is most often encountered in children than adults and is most often caused by<jats:italic>Streptococcus pneumoniae<\/jats:italic>. Different combinations of parenchymal and pleural abnormalities may be suggestive for additional diagnoses.<\/jats:p><jats:p>When an infectious pulmonary process is suspected, knowledge of the varied radiographic manifestations will narrow the differential diagnosis, helping to direct additional diagnostic measures, and serving as an ideal tool for follow-up examinations.<\/jats:p>","DOI":"10.1183\/09031936.01.00213501","type":"journal-article","created":{"date-parts":[[2002,10,11]],"date-time":"2002-10-11T18:37:23Z","timestamp":1034361443000},"page":"196-208","source":"Crossref","is-referenced-by-count":239,"title":["Imaging of pneumonia: trends and algorithms"],"prefix":"10.1183","volume":"18","author":[{"given":"T.","family":"Franquet","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"81","published-online":{"date-parts":[[2001,7,1]]},"reference":[{"key":"2024101808501791000_18.1.196.1","doi-asserted-by":"publisher","DOI":"10.1016\/S0149-2918(98)80144-6"},{"key":"2024101808501791000_18.1.196.2","first-page":"634","volume":"274","year":"1995","journal-title":"JAMA"},{"key":"2024101808501791000_18.1.196.3","doi-asserted-by":"publisher","DOI":"10.1016\/0002-9343(85)90361-4"},{"key":"2024101808501791000_18.1.196.4","unstructured":"Lung disease data 1994. 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