Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Low lung volumes limits evaluation . Bibasilar atelectasis is present . There is no convincing evidence for pneumonia or edema . No large effusion or pneumothorax . Heart size is difficult to assess . Mediastinal contour is normal . Bony structures are intact .
    OUTPUT:
    
Bibasilar atelectasis . Otherwise unremarkable .