Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . No prior . The lungs are clear . There is no pneumothorax or pleural effusion . The cardiomediastinal silhouette is within normal limits . Free air identified below the right hemidiaphragm , compatible with recent surgery . Osseous and soft tissue structures are otherwise unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process . Free air below the diaphragms compatible with recent surgery .