Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is very mild volume loss at the left base suggesting minor atelectasis . There is no pleural effusion or pneumothorax . There is no free air .
    OUTPUT:
    
Minor suspected atelectasis at the left lung base , but no evidence of acute process . No free air identified .