Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear without focal opacities , pleural effusion or pneumothorax . The cardiac and mediastinal contours are stable . Elevation the right hemidiaphragm is chronic . No free air beneath the hemidiaphragms .
    OUTPUT:
    
No acute cardiothoracic process . No free air beneath the hemidiaphragms .