Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval progression of a moderate to large right - sided pleural effusion . Lung volumes remain low , with mild pulmonary vascular congestion . Cardiomegaly is unchanged . Incidental note of several metallic BBs in the left chest soft tissues .
    OUTPUT:
    
Interval progression of the right - sided pleural effusion , now moderate to large in size .