Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lungs remain hyperinflated with flattened diaphragms suggesting COPD . The heart is unchanged and normal in size . Mediastinal contours normal . No pleural effusion or pneumothorax . Bony structures appear grossly intact .
    OUTPUT:
    
COPD without superimposed acute process .