Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mildly enlarged . The mediastinal and hilar contours are grossly unchanged . There is mild cephalization of pulmonary vascular markings suggestive of mild pulmonary vascular congestion , new in the interval . Patchy opacities in the lung bases may reflect areas of atelectasis though infection is not excluded . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary vascular congestion , new in the interval . Patchy bibasilar opacities , findings which may reflect atelectasis but infection is not excluded .