Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior exam , the patient is status post a left thoracentesis . The left pleural effusion has significantly decreased in size . A small pleural effusion persists . There is no evidence of a pneumothorax . Bibasilar atelectasis appears improved , though still present . There is no new consolidation or pulmonary edema . Fibrotic changes at the bases are stable . There is no right pleural effusion . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Interval decrease in size of the left pleural effusion . No evidence of pneumothorax .