Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate to severe cardiomegaly . The aorta is mildly tortuous . There is mild pulmonary edema with perihilar haziness and vascular indistinctness . Patchy retrocardiac opacity likely reflects atelectasis . No pleural effusion or pneumothorax is seen . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild pulmonary edema .