CT of pulmonary edema.

We describe our experience with CT of the chest in the diagnosis of pulmonary edema due to congestive heart failure, overhydration, renal failure, or increased capillary permeability. CT is able to detect acinar shadows and air-bronchograms more clearly than conventional radiography. Specific pattern of distribution of edema can be imaged in cross-section due to the elimination of superimposition of structures. In patients with adult respiratory distress syndrome, CT can detect microcystic transformation of the lung, which indicates a worse prognosis. Complications of ARDS, not always clearly visible on bedside chest radiographs, can be identified with CT.