Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No new opacities is identified in the lungs . Postoperative changes in the right mid to low lung zone is less conspicuous compared to prior . Right lung is better ventilated compared to prior . There is no pleural effusion or pneumothorax . Cardiac silhouette is normal size .
    OUTPUT:
    
Improved ventilation of right lung compared to prior .