Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is top - normal in size . The pulmonary vasculature is unremarkable . The the lungs are clear . There is no definite pleural effusion or pneumothorax . No displaced rib fracture is identified . Vertebral body heights are maintained . Plain radiographs , however , are limited for of evaluation for traumatic injury . .
    OUTPUT:
    
No acute intrathoracic abnormality .