Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate moderate cardiomegaly , unchanged from previously . The cardiomediastinal silhouette and hilar contours are unchanged . The aorta is tortuous with atherosclerotic calcifications . There is mild pulmonary edema . No pleural effusion or pneumothorax . No displaced rib fracture identified . Sternotomy wires are intact .
    OUTPUT:
    
Mild pulmonary edema .