Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The PICC has been pulled back and is now within the mid SVC . Improved aeration with minimal subsegmental atelectasis in the lung bases . The heart is not enlarged . No pneumothorax or significant effusions .
    OUTPUT:
    
The PICC is now in the mid SVC . No pneumothorax . Minimal persistent subsegmental atelectasis in the lung bases .