Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No focal consolidation is identified . Subtle opacity projecting over the left fourth rib laterally likely represents pleural thickening as seen on CT chest from ___ and stable over at least ___ years . The cardiomediastinal silhouette , hila contours , and pleural surfaces are normal . There is no pleural effusion or pneumothorax . Visualized upper abdomen is unremarkable without evidence of pneumoperitoneum .
    OUTPUT:
    
No evidence of pneumoperitoneum .