Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs through the chest demonstrate clear lungs bilaterally . The cardiomediastinal silhouette and hilar contours are normal . There is no pleural effusion or pneumothorax . Visualized osseous structures are unremarkable .
    OUTPUT:
    
No acute intrathoracic abnormality .