Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is unchanged . Mediastinal and hilar contours are unremarkable . 5 mm right lower lobe pulmonary nodule appears unchanged . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is identified . There are mild degenerative changes within the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .