Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are unremarkable . Lungs are clear . Previously identified nodules on CT are not definitively visualized on this study . There is no pleural effusion or pneumothorax . The osseous structures are grossly unremarkable without distracted rib fracture .
    OUTPUT:
    
No acute intrathoracic process . No evidence of distracted rib fracture .