Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , no definite interval change . Again seen is patchy opacity about the right lung base and minimal atelectasis at the left lung base . No pneumothorax is detected . Prominence of the mediastinum is similar to the prior film . No mediastinal emphysema is identified .
    OUTPUT:
    
No definite change compared with ___ at 08 :54 . The cardiomediastinal contours are similar to the prior film . ( Note is made that the report from a prior film noted that the paratracheal widening expanded postoperatively . )