Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . There is no evidence of a large hiatal hernia on this radiograph . The lung volumes are low , but no focal consolidation , pleural effusion or pneumothorax is seen . Linear atelectasis is seen in the left lung base .
    OUTPUT:
    
Within the limitations of the study , no large hiatal hernia is detected .