Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lung volumes are markedly low with bibasilar atelectasis noted . No convincing evidence of pneumonia , edema , large effusion or pneumothorax . The cardiomediastinal silhouette appears grossly unchanged though lung volumes somewhat limit assessment . The imaged bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Bibasilar atelectasis , otherwise unremarkable .