Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiographs were obtained . Lung volumes are lower compared with the prior study , accentuating the pulmonary vasculature and increasing bibasilar atelectasis . There is mild peribronchial cuffing , but no evidence of interstitial or alveolar edema . The heart and mediastinal contours are normal . No effusion or pneumothorax is present .
    OUTPUT:
    
Low lung volumes accentuate the pulmonary vasculature and bibasilar dependent atelectasis .