Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The aorta remains mildly tortuous . Pulmonary vasculature is normal . Hilar and mediastinal contours are unremarkable . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is visualized . There are mild degenerative changes noted in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormality .