Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval improvement in right - sided pulmonary opacity with some haziness over the right mid to lower lung remaining . There appears to be a posterior left pleural effusion / pleural thickening . No pneumothorax is seen . The cardiac silhouette is top - normal to mildly enlarged . Mediastinal contours are grossly unremarkable .
    OUTPUT:
    
Left pleural effusion and / or pleural thickening . Subtle opacity projecting over the right mid to lower lung has decreased compared to prior studies . No definite new focal consolidation seen .