Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is moderately enlarged . The mediastinal contours otherwise are unremarkable . There is mild pulmonary vascular congestion but no pulmonary edema is present . No pleural effusion or pneumothorax is demonstrated . Streaky opacities in the retrocardiac region likely reflect atelectasis . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild retrocardiac atelectasis and mild pulmonary vascular congestion .