Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Heart size is normal . Mediastinal and hilar contours are unremarkable . The pulmonary vasculature appears normal . Minimal atelectasis or scarring is seen within the left lung base . There may be trace bilateral pleural effusions posteriorly on the lateral view . No focal consolidation or pneumothorax is present . There are mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Probable trace bilateral pleural effusions . Otherwise no acute cardiopulmonary abnormality including no evidence of congestive heart failure .