Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly , decreased compared to prior . Tortuosity of the thoracic aorta with not calcifications are unchanged . Otherwise postoperative mediastinal silhouette is unremarkable . Lungs are clear . No edema . No effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .