Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low which accentuate the size of the cardiac silhouette which is mildly enlarged . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is present . No acute osseous abnormalities seen . No free air is demonstrated under the diaphragms .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No subdiaphragmatic free air .