Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , moderate bilateral pleural effusions are slightly improved and moderate bibasilar and retrocardiac atelectasis is unchanged . A right Port -a - Cath is seen with the tip in the low SVC . The lung volumes are low . A new right chest tube is noted . Para-mediastinal masses are again identified , and better assessed on prior PET - CT . The heart size is difficult to evaluate . No pneumothorax .
    OUTPUT:
    
1 . Moderate bilateral pleural effusions are slightly improved and moderate bibasilar retrocardiac atelectasis is unchanged since ___ . No pneumothorax .