Chest CT, particularly HR chest CT, is the primaryradiographic tool for assessing treatment failure of a presumed pneumonia. Compared with conventional chest radiography, HR chest CT allows superior detection of parenchymal abnormalities, including emphysema, airspace disease, interstitial disease, and nodules. Such findings may narrow the differential diagnosis or suggest new possibilities not previosly under consideration. Chest CT also detects sequestered foci of infection, such as lung abscess and empyema, and helps direct biopsy procedures. - UptoDate nonresolving pneumonia.
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