Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs . No focal opacity convincing for pneumonia is identified . Left basilar atelectasis is mild . Cardiomediastinal and hilar contours are within normal limits . There is no large pleural effusion or pneumothorax . Visualized osseous structures demonstrates no acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality .