Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again appreciated are small - to - moderate bilateral pleural effusions ; the amount on the left unchanged and decreased on the right , expected after thoracentesis . There is no pneumothorax . Again appreciated are perihilar and bibasilar opacities and vascular congestion compatible with edema . Longstanding appearance of paramediastinal fibrosis is compatible with history of radiation therapy .
    OUTPUT:
    
Interval decrease in size of right pleural effusion without evidence of pneumothorax . Persistent edema .