Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been marked improvement in previously visualized moderate pleural effusion on the right with a small pleural effusion persisting . There is also a small left pleural effusion . Otherwise , mild bibasilar atelectatic changes are again visualized but the lungs are without any focal consolidation or pneumothorax . The cardiomediastinal silhouette appears stable . Mild degenerative changes of the thoracic spine along with demineralized osseous structures appear stable . Post-surgical changes are visualized with surgical clips overlying the left hemiabdomen .
    OUTPUT:
    
Marked decrease in right effusion following thoracentesis with no pneumothorax .