Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of cardiac silhouette is noted . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is normal . No focal consolidation , pleural effusion or pneumothorax is seen . Minimal retrocardiac atelectasis is noted . There are no acute osseous abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .