Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The cardiomediastinal silhouette and pulmonary vasculature are unremarkable . Again noted is a large right - sided pleural effusion , slightly smaller status post thoracentesis . Persistent adjacent right middle and lower lobe consolidation and or atelectasis .
    OUTPUT:
    
Large right - sided pleural effusion , slightly decreased following thoracentesis