Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP upright chest radiograph demonstrates hyperinflated lungs and flattening of the diaphragms . Prominent interstitial markings are noted at bilateral lung bases which when compared to prior study dated ___ is largely unchanged . No focal consolidation convincing for pneumonia is seen . Heart is within upper limits of normal in size . There is no evidence of pulmonary edema . There is no pneumothorax or large pleural effusion .
    OUTPUT:
    
Findings suggestive of emphysema with prominent interstitial markings at bilateral lung bases largely unchanged compared to prior study dated ___ . No evidence convinced for an acute infectious process .