Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left lung remains clear , and there is in fact decreased atelectasis seen at the left lung base . There is no left pleural effusion or pneumothorax . On the right , there are post-surgical changes identified about the right hila . There is persistent partially loculated right pleural effusion , though this is decreased in size compared to ___ . There is no pneumothorax , and no new parenchymal opacity to suggest pneumonia . Post-operative changes are seen involving the right posterior sixth rib . The cardiomediastinal contours are unchanged . There is no pulmonary vascular congestion or edema .
    OUTPUT:
    
Decrease in partially loculated right pleural effusion .