Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Free air is seen beneath the diaphragm , compatible with the patient 's recent cholecystectomy . The lungs are clear without focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is with normal limits .
    OUTPUT:
    
No acute cardiopulmonary process . Pneumoperitoneum is compatible with recent abdominal surgery .