Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours appear relatively unchanged allowing for differences in modalities with known mediastinal lymphadenopathy better seen on the previous CT . Pulmonary vasculature is not engorged . Mild patchy atelectasis is noted in both lung bases without focal consolidation . Bilateral scattered pulmonary nodules compatible with metastases are re - demonstrated , better appreciated on the previous CT . No pleural effusion or pneumothorax is demonstrated . Mild degenerative changes are present within the thoracic spine .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . Known mediastinal lymphadenopathy and pulmonary metastases are better visualized on the previous CT .