Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The cardiomediastinal silhouette and hilar contours are unremarkable . The lungs are clear . There is no pleural effusion or pneumothorax . No rib fracture is identified . The osseous structures are otherwise grossly unremarkable .
    OUTPUT:
    
No acute intrathoracic process . Specifically , no evidence of rib fracture .