Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild bibasilar atelectasis . Left lung base atelectasis is slightly improved compared to ___ . Cardiomediastinal silhouette is unchanged . Left PICC line terminates in the upper SVC .
    OUTPUT:
    
Mild bibasilar atelectasis . Left lung base atelectasis slightly improved compared to ___ .