Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right PICC terminates at the upper SVC . A moderate left pleural effusion has improved since the ___ , now demonstrating aeration of the left upper lobe and resolution of previously seen right mediastinal shift . There is pulmonary vascular congestion with mild edema . There is no pneumothorax .
    OUTPUT:
    
Moderate left pleural effusion has improved , reflecting interval thoracentesis . Previously seen right mediastinal shift has resolved . No pneumothorax . Mild pulmonary vascular congestion .