Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates clear lungs bilaterally . Heart size is normal . The aorta is unfolded . Mediastinal and hilar contours are otherwise unremarkable . There is no pneumothorax , pleural effusion , or evidence of pulmonary edema . No air is seen under the right hemidiaphragm .
    OUTPUT:
    
No acute intrathoracic abnormality .