Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear opacity within the peripheral left lung base likely reflects subsegmental atelectasis due to an a large epicardial fat pad . No confluent consolidation is identified . There is no pulmonary edema or pleural effusion . Cardiomediastinal and hilar contours are within normal limits . There is no pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process