American Journal of Roentgenology, Vol 160, 249-251, Copyright © 1993 by American Roentgen Ray Society

ARTICLES

Ground-glass opacity of the lung parenchyma: a guide to analysis with high-resolution CT

CE Engeler, JH Tashjian, SW Trenkner and JW Walsh
Department of Radiology, University of Minnesota Hospital, Minneapolis 55455.

Ground-glass opacity is a frequent but nonspecific finding on high- resolution CT scans of the lung parenchyma. The underlying abnormality is diverse; any condition that decreases the air content of the lung parenchyma without totally obliterating the alveoli can produce ground- glass opacity. These processes are not visible on high-resolution CT scans. However, in specific clinical settings, the information provided by high-resolution CT is considerable when the anatomic distribution and associated structural changes to the lung parenchyma are analyzed. This pictorial essay illustrates the pathologic basis of ground-glass opacity and provides a guide to the differential diagnosis of the disorders that can produce this appearance.
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