Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate stable low lung volumes . Allowing for such , the heart is normal in size . Mild unfolding of the thoracic aorta is unchanged . The lungs are clear . There is no vascular congestion , pleural effusion , or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary process .