Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of cardiac silhouette is re - demonstrated . The mediastinal and hilar contours are unchanged . The pulmonary vasculature is not engorged . Apart from minimal retrocardiac atelectasis , the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is demonstrated . No acute osseous abnormality is detected .
    OUTPUT:
    
No acute cardiopulmonary abnormality .