Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Heart size is within normal limits . The aorta is tortuous but stable in appearance when compared to radiograph dated ___ . There is no pleural effusion or evidence of pneumothorax . No acute osseous abnormality is identified .
    OUTPUT:
    
No acute intrathoracic abnormality .