Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . There is no pulmonary edema . Patchy opacities in the lung bases may reflect atelectasis though infection can not be completely excluded . No pleural effusion or pneumothorax is visualized . Clips are noted within the right upper quadrant of the abdomen .
    OUTPUT:
    
Patchy bibasilar opacities likely reflect atelectasis though infection can not be completely excluded .