Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . Blunting of the left costophrenic angle is largely unchanged since prior exam , suggestive of small pleural effusion and / or pleural thickening . There is no right pleural effusion . No focal consolidation is seen . Subtle linear opacities in the left mid lung ___ , ___ represent areas of scarring . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no pulmonary edema . No pneumothorax is seen . Partially imaged upper abdomen is unremarkable . Areas of pleural calcifications are best seen on the lateral view , suggestive of prior asbestos exposure .
    OUTPUT:
    
1 . No evidence of acute cardiopulmonary process . 2 . Persistent blunting of the left costophrenic angle , suggestive of small pleural effusion and / or pleural thickening .