Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded with flattened diaphragms and are clear . Hila and cardiomediastinal contours are normal . No pleural effusion .
    OUTPUT:
    
1 . No radiographic evidence of TB or malignancy . 2 . Hyperexpanded lungs with flattened diaphragms suggests chronic obstructive pulmonary disease .