Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The central pulmonary vessels are prominent . Patchy and reticular bilateral interstitial opacities are again seen , less distinct since the ___ examination . No large consolidation is seen , however , underlying atypical infection can not be excluded . There is no effusion or pneumothorax .
    OUTPUT:
    
Chronic - appearing interstitial opacities , however , no focal consolidation is seen . There may be chronic changes from sequela of prior multiple infections . Atypical infection can not be excluded .