Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . When compared to prior radiograph dated ___ , there has been little interval change . Cardiomediastinal and hilar contours are stable and within normal limits . There is no pleural effusion or pneumothorax . No evidence of pulmonary edema .
    OUTPUT:
    
No acute intrathoracic abnormality .