Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs were obtained . Lung volumes are low . Elevation of the right hemidiaphragm is unchanged . A large hiatal hernia is again seen . The cardiac and mediastinal contours are stable including widening of the of the upper mediastinum . Cholecystectomy clips project over the right upper quadrant .
    OUTPUT:
    
No acute cardiopulmonary process . Large hiatal hernia .