Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly and tortuosity of the thoracic aorta appears unchanged since ___ . Hilar contours are unremarkable . There is no evidence of fluid overload . Lungs are clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .