Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left internal jugular central venous catheter ends in the mid SVC , unchanged . The lungs remain hyperinflation . Right mid to upper lung aeration has slightly improved . There is persistent mild bibasilar atelectasis as well as unchanged small bilateral pleural effusions . The cardiac and mediastinal contours are unchanged . Enlargement of the hila likely relates to dilation of the pulmonary arteries , similar to the prior study . There is no pneumothorax .
    OUTPUT:
    
1 . Improved right mid to upper lung aeration . 2 . Small bilateral pleural effusions , unchanged . 3 . Hilar enlargement is likely due to dilation of the pulmonary arteries .