Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Cardiomediastinal contour including enlargement of the cardiac silhouette is stable . There is persistent right basilar atelectasis . Lungs are otherwise clear . There is no pleural effusion or pneumothorax . Pacer leads are in appropriate position , unchanged .
    OUTPUT:
    
No substantial change compared to the prior examination .