Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well expanded . Blunting of the left costophrenic angle may represent a small residual pleural effusion or pleural thickening . Linear opacities along the left lung base likely represent atelectasis or scarring . The lungs are otherwise clear , without focal consolidation or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Pleural thickening versus residual small left pleural effusion , with adjacent linear scar or atelectasis . These findings were discussed with Dr . ___ by Dr . ___ ___ telephone at 11 :20 a .m . as per request .