Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided PICC terminates in the cavoatrial junction . There has been interval improvement in pulmonary edema . The heart is mildly enlarged . Mediastinal silhouette is unchanged . The lung volumes have improved . Bibasilar atelectasis has improved .
    OUTPUT:
    
1 . Left - sided PICC terminates in the cavoatrial junction . 2 . Pulmonary edema has improved .