Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and aortic valve replacement . Heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Minimal atelectasis is noted in the left lower lobe . No focal consolidation or pneumothorax is present . Minimal blunting of the costophrenic sulci posteriorly on the lateral view suggests trace bilateral pleural effusions . No acute osseous abnormality is present .
    OUTPUT:
    
Trace bilateral pleural effusions without focal consolidation to suggest pneumonia .