Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval increase in mild pulmonary edema with cephalization of pulmonary vessels . Right apical scarring is stable . There is a retrocardiac opacity . No pneumothorax or pleural effusion . Prominence of the pulmonary arteries are again noted , unchanged since prior examination . Heart size and mediastinal contour are otherwise unremarkable . Elevated right hemidiaphragm is unchanged in appearance .
    OUTPUT:
    
1 . Progression of mild pulmonary edema . 2 . Stable prominence of pulmonary arteries . 3 . Retrocardiac opacity is most consistent with atelectasis . Clinical correlation recommended for superimposed infection .