Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded with flattening of diaphragms , consistent with emphysema . Opacities in the right lung base are consistent with pneumonia . No pneumothorax or pleural effusion . Heart size is normal and mediastinal contours , including tortuosity of the aorta , are stable .
    OUTPUT:
    
Right lung base opacities likely reflect focal scar or atelectasis but FOLLOW UP PA and lateral CXR is recommended when clinically feasible to exclude focal / early pneumonia .