Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . The lungs are mildly hyperinflated but clear . There is no evidence of pulmonary vascular congestion or pulmonary edema . There is no consolidation , effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .