Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is top normal . Mediastinal and hilar contours are unremarkable . There is no pulmonary edema . Lungs are clear . No focal consolidation , pleural effusion or pneumothorax is visualized . There are minimal degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .