Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Lungs are hyperexpanded . There is no opacity worrisome for an infectious process . Known pulmonary nodules present on CT dated ___ are not well appreciated and better assessed on CT . There is no pleural effusion or pneumothorax . No evidence of pulmonary edema . Cardiomediastinal silhouette is normal .
    OUTPUT:
    
No acute intra thoracic abnormality .