Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Fiducial markers again seen projecting over the right pulmonary hilum and right upper lung at the site of known nodules . There is interval development of left basilar atelectasis . Otherwise , no significant change from prior .
    OUTPUT:
    
Left basal atelectasis new from prior . Otherwise unchanged .