Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette and hilar contours are unchanged from prior examination . Heart size is normal , with mildly tortuous thoracic aorta . Lungs are clear . There is no pleural effusion or pneumothorax . Prominent degenerative change at a mid thoracic level is unchanged from prior study .
    OUTPUT:
    
No acute cardiopulmonary abnormality .