Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to large left pleural effusion is similar to prior . The right lung is clear . There is no pneumothorax . The cardiomediastinal silhouette is normal where seen . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Moderate to large left pleural effusion is similar to prior .