Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest . The lungs are well expanded and clear . No pleural effusion or pneumothorax . The cardiomediastinal silhouette is mildly enlarged . The free air is seen under the diaphragm .
    OUTPUT:
    
No acute cardiopulmonary process . No free air under the diaphragm .