Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is present . Dense atherosclerotic calcifications are seen throughout the thoracic aorta . Mild to moderate pulmonary edema is improved compared to the previous exam with upper zone vascular redistribution , perihilar haziness and vascular indistinctness . No focal consolidation or pneumothorax is present . Trace left pleural effusion is noted .
    OUTPUT:
    
Mild to moderate pulmonary edema , improved compared to the previous study . Trace left pleural effusion .