Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperexpanded but clear . The heart is not enlarged . There is no mediastinal widening . Aortic contour is grossly normal . There is no pneumothorax or large pleural effusion . Within the limitations of routine chest radiography the included osseous structures are grossly intact .
    OUTPUT:
    
No acute cardiopulmonary abnormality .