Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is present . The aorta is tortuous . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . There are minimal degenerative changes noted in the thoracic spine . Clips in the neck indicate prior thyroidectomy .
    OUTPUT:
    
No acute cardiopulmonary abnormality .