Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hypoinflated with crowding of vasculature . In comparison to prior examinations there is apparent widening of the mediastinum which may be positional in nature . The contour of the descending aorta is smooth and unchanged since prior examination . Again seen is moderate cardiomegaly , stable since prior examination . A stable left basilar opacity likely represents a combination of small pleural effusion and atelectasis . Right lung is clear . Median sternotomy wires are intact . Mediastinal clips and right chest wall clips are again noted .
    OUTPUT:
    
1 . Mild apparent widening of the mediastinum , may be positional in nature . 2 . No pulmonary edema . 3 . Stable moderate cardiomegaly . 4 . Stable left basilar atelectasis with small left pleural effusion .