Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and grossly clear . There is a large hiatal hernia with stable appearance compared to prior . There is no pulmonary edema , pleural effusion or calcifications , or pneumothorax . The cardiac size can not be assessed . The mediastinal and hilar contours are normal . There is marked scoliosis .
    OUTPUT:
    
No signs of acute or chronic TB infection .