Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low leading to crowding of the bronchovascular structures . Bibasilar atelectasis is noted . The upper lungs are clear without focal consolidation , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is unchanged in appearance .
    OUTPUT:
    
Low lung volumes without overt cardiopulmonary process .