Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph , there has been interval increase in a now large right pleural effusion . Lung volumes are decreased . The left lung is essentially clear . Cardiomediastinal silhouette can not be assessed . There is no pneumothorax .
    OUTPUT:
    
Large right pleural effusion , increased in size since prior examination .