Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph is compared to prior radiograph dated ___ . The chest overall is unchanged in appearance . No focal opacity convincing for pneumonia is present . Obscuration of the right heart border is unchanged relative to prior examination and when correlated with CTA performed ___ appears to be correlate with mediastinal fat . Lungs are slightly hyperinflated with emphysematous changes . There is no large pleural effusion . There is no pneumothorax or evidence of pulmonary edema . Heart size is top normal . Vasculature is slightly engorged relative to prior examination .
    OUTPUT:
    
Emphysematous changes without evidence of pneumonia .