<prompt> Answer this question truthfullyWhat is the purpose of a CT scan for detecting pulmonary edema?  <response>: <reason> Thoracic CT scan may be helpful in the diagnosis of pulmonary edema. Findings on CT scan diagnostic of hydrostatic pulmonary edema include:Cardiomegaly Vascular engorgement Pleural effusionsFindings on CT scan diagnostic of interstitial pulmonary edema include:Bronchial wall thickening Smooth interlobular septal thickening Ground-glass opacity often with hazy, poorly defined centrilobular nodules 