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