Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post right upper lobectomy . There is mild interval improvement in aeration of the right upper lung with large persistent right pleural effusion with known underlying nodularity , better assessed on recent PET - CT . The left lung is essentially clear . The visualized portions of the cardiac silhouette and mediastinum are unremarkable . A right Port - A - Cath is present with tip terminating in the distal SVC .
    OUTPUT:
    
Mild improvement in aeration of the right upper lung since the most recent prior study . Significant right pleural disease remains .