Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided PICC has been pulled back with the tip near the cavoatrial junction . Improved aeration of the lung bases . No pulmonary edema or focal opacification . Cardiac silhouette is not enlarged . No pleural effusions or pneumothorax .
    OUTPUT:
    
Left PICC near the cavoatrial junction . No pulmonary edema or focal opacification .