Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 13 mm nodular density in the right upper lobe has been previously imaged on CT chest of ___ with followup recommendations . Lung volumes are low with mild bibasilar atelectasis . However , there is no focal consolidation , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Bibasilar atelectasis . Stable 13 mm right upper lobe nodule described on recent CT .