Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right approach PICC terminates in the upper SVC , unchanged . Nasoenteric catheter courses below the diaphragm and is at least within the stomach . Overall aeration of the left lung base has improved in the interval , though basilar atelectasis and small bilateral effusions persist . A vena cava filter is in unchanged position . There is no pneumothorax . A probable biliary stent is partially imaged in the right upper abdomen .
    OUTPUT:
    
Slightly improved aeration of the left lower lobe , otherwise no significant change from recent prior .