Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small to moderate pleural effusion on the left , with adjacent compressive atelectasis . Right lung is essentially clear , without effusion or consolidation . No pneumothorax . Heart size is normal . There is no subdiaphragmatic free air .
    OUTPUT:
    
Small to moderate left pleural effusion with adjacent compressive atelectasis . No evidence of pneumonia .