Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright AP and lateral radiographs of the chest demonstrate low lung volumes , with elevation of the left hemidiaphragm and streaky atelectasis in the left lung base . Bilateral chest wall pulse generators , likel deep brain stimulators , are noted . A right upper chest wall pulse generator with dual - lead pacemaker is unchanged since the prior study . There is no pleural effusion or overt pulmonary edema . The heart size is stable compared to the prior study .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis .