Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . A small to moderate size hiatal hernia is re - demonstrated . Atherosclerotic calcifications are noted at the aortic knob . The mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is normal . Lungs are hyperinflated but clear . No pleural effusion or pneumothorax is detected . No acute osseous abnormality is seen .
    OUTPUT:
    
Small to moderate size hiatal hernia . Otherwise , no acute cardiopulmonary process .