Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrate clear lungs bilaterally . There is no pleural effusion or pneumothorax . The left chest pacer defibrillator is identified , its leads in standard position . Cardiomediastinal and hilar contours are within normal limits . Two tubular structures are identified he over the right upper quadrant in keeping with known bilateral internal external biliary drains . Osseous structures are without an acute abnormality .
    OUTPUT:
    
No acute intrathoracic abnormality .