Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly underinflated but appear clear . There is no focal airspace opacity to suggest pneumonia . The cardiomediastinal silhouette and hilar contours are stable . Heart size is somewhat exaggerated by low lung volumes and likely normal in size . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Slightly low lung volumes but no evidence of acute cardiopulmonary abnormality .