Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild enlargement of cardiac silhouette which is unchanged . There is mild perihilar haziness and cephalization of the pulmonary vascular markings suggestive of mild pulmonary vascular congestion , similar compared to the previous exam . Patchy retrocardiac opacity most likely reflects atelectasis . There is no pleural effusion or pneumothorax . No acute osseous abnormalities seen .
    OUTPUT:
    
Mild pulmonary vascular congestion , similar compared to the previous exam .