Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lung volumes are low with bronchovascular crowding atelectasis of the lung bases . No convincing evidence for pneumonia or CHF . No large effusion or pneumothorax . The cardiomediastinal silhouette is stable . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Bibasilar atelectasis , otherwise unremarkable .