Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endobronchial valve projects over the left hilum , similar compared to the prior study . There is persistent herniation of the right lung leftward . The appearance of the chest is without significant interval change . Cardiac and mediastinal silhouettes are stable . No pleural effusion or pneumothorax is seen . No pulmonary edema is seen .
    OUTPUT:
    
No significant interval change .