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 . Cardiomediastinal and hilar contours are within normal limits . No overt pulmonary edema . A large hiatal hernia is again identified . Osseous structures are without an acute abnormality .
    OUTPUT:
    
Large hiatal hernia . No acute intrathoracic abnormality .