Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiomegaly appears unchanged . The mediastinal and hilar contours are unchanged . Mild upper zone vascular redistribution suggests mild pulmonary vascular congestion . Streaky bibasilar opacities likely reflect areas of atelectasis . No pleural effusion or pneumothorax is identified . No acute osseous abnormality is visualized .
    OUTPUT:
    
Mild pulmonary vascular congestion .