Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph demonstrates clear lungs bilaterally . There is no pneumothorax or pleural effusion . Cardiomediastinal and hilar contours are normal . There is no pulmonary edema . No air under the right hemidiaphragm is seen .
    OUTPUT:
    
No acute intrathoracic abnormality .