Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low with mild accentuation of the cardiac silhouette . Heart size is top - normal . Thoracic aorta is tortuous . Hilar contours are unremarkable . Lungs are grossly clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .