Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large hiatal hernia with an air - fluid level . The heart is normal in size . The mediastinal and hilar contours are unremarkable within the limitations of technique . Streaky medial basilar opacities suggest minor atelectasis or scarring , but there are no findings suggestive of pneumonia of congestive heart failure . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Large hiatal hernia . No evidence of acute disease .