Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The cardiomediastinal silhouette and hilar contours are unremarkable . There is mild bibasilar atelectasis with linear lingular atelectasis . Lungs are otherwise clear . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .