Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chronic stable blunting of left costophrenic angle only seen on lateral is likely from scarring . Linear opacity in the left lower lobe is likely atelectasis or scar and is unchanged . No new focal opacity , pleural effusion , pneumothorax or pulmonary edema . Heart size , mediastinal contour and hila are normal . Anterior cervical fusion is again noted without additional bony abnormality .
    OUTPUT:
    
1 . Chronic stable scarring of the left costophrenic angle . 2 . Stable left lower lobe opacity which is either atelectasis or scar .