Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperexpanded with flattened hemidiaphragms , but clear . The cardiomediastinal silhouette , hilar contours and pleural surfaces are normal . There is no pleural effusion or pneumothorax . There is no pulmonary edema . There are foci of calcification in the hila bilaterally , likely calcified lymph nodes .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . COPD