Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the immediate prior study of ___ , there is slightly improved aeration in the right upper lung . The moderate to large right - sided pleural effusion is unchanged , with rightward tracheal deviation suggesting complete right lower lobe collapse . A right pigtail catheter is in unchanged position . The minimal pulmonary vascular congestion and mild interstitial edema in the left lung are unchanged . There is no pneumothorax .
    OUTPUT:
    
1 . Slightly improved right lung aeration . 2 . Unchanged moderate to large right pleural effusion , likely with superimposed right lower lobe collapse . 3 . Unchanged pulmonary vascular congestion and mild pulmonary edema in the left lung .