Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Chronic scarring in the left lower lobe accounts for retrocardiac opacity . No new consolidation is seen . No evidence of edema , large effusion or pneumothorax . Cardiomediastinal silhouette is stable . Bony structures are intact . No free air below the right hemidiaphragm
    OUTPUT:
    
No acute findings . Stable retrocardiac opacity compatible with scarring in the left lower lobe .