Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lines and Tubes : None Lungs : Well inflated with persistent bibasilar opacities likely atelectasis . Pleura : There are bilateral pleural effusions that appears slightly improved compared to the prior radiograph . Mediastinum : Cardiomegaly remains unchanged . Bony thorax : No interval change .
    OUTPUT:
    
Persistent but slight interval improvement in bilateral pleural effusions and bibasilar atelectasis . Unchanged cardiomegaly .