Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . The cardiomediastinal silhouette and hilar contours are normal . There is no pleural effusion or pneumothorax . No definite rib fractures identified . Included upper abdomen is unremarkable .
    OUTPUT:
    
No acute intrathoracic process . No definite rib fracture .