Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . There is scarring at the right lung base , with a chronic appearance though no prior studies are available for comparison . There is no focal consolidation , effusion or pneumothorax . The cardiomediastinal silhouette appears normal . Imaged osseous structures are intact . There is right AC joint arthropathy incidentally noted .
    OUTPUT:
    
Chronic appearance of scarring in the right lower lung . No acute intrathoracic process .