Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are stable with mild cardiomegaly . Pacer lead tip is in the right ventricle . The lungs are clear . There is no pneumothorax or pleural effusion . There are mild - to - moderate moderate degenerative changes in the thoracic spine .
    OUTPUT:
    
No acute cardiopulmonary abnormalities