Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been a slight improvement in bibasilar lung aeration as well as mild pulmonary edema . However , moderate pleural effusions persist bilaterally . Atrioventricular pacer defibrillator remains in the left hemithorax . There is no evidence of new consolidation , effusions , or pneumothoraces .
    OUTPUT:
    
Mild improvement in bibasilar lung aeration . Persistent moderate pleural effusions persist .