Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated with flattening of the diaphragms . Lungs are otherwise clear . No pleural effusion or pneumothorax . Heart size and mediastinal contour are normal . Dilatation of bilateral pulmonary arteries is unchanged since ___ , suggests pulmonary arterial hypertension . Right port tip is in the right atrium .
    OUTPUT:
    
1 . Emphysema / chronic obstructive pulmonary disease . 2 . No pneumonia .