Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes somewhat limit assessment . There is mild left basal atelectasis . Cardiomediastinal silhouette unchanged . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable . Bony structures are intact . Chronic left upper rib cage deformities unchanged .
    OUTPUT:
    
Mild basal atelectasis . Otherwise unremarkable .