Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph demonstrate clear lungs bilaterally . Cardiomediastinal and hilar contours are within normal limits . There is no pneumothorax , pleural effusion , or evidence of pulmonary edema . Imaged upper abdomen is unremarkable .
    OUTPUT:
    
No acute intrathoracic abnormality .