Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Lung volumes are low with mild basal atelectasis noted . Otherwise lungs are clear . Heart size is normal . Mediastinal contour appears grossly unremarkable allowing for patient 's slightly rightward rotation . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Bibasal atelectasis , otherwise unremarkable .