Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits , there is no pneumomediastinum . There is no visualized large hiatal hernia based on plain film . Osseous structures are unremarkable . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
No acute cardiopulmonary process . No large hiatal hernia based on evaluation by plain film .