Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are well expanded and clear . Pleural surfaces are normal without pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are normal . No hiatal hernia . Visualized osseous structures are unremarkable . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute cardiopulmonary process .