Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is unchanged . The thoracic aorta is diffusely calcified . Mediastinal and hilar contours are similar with a large left sided hiatal hernia again noted . Streaky opacity is demonstrated within the left lower lobe , as seen on previous examinations , without new focal consolidation demonstrated . Pulmonary vasculature is not engorged . No pleural effusion or pneumothorax is present . Remote left - sided rib fractures are visualized . Hypertrophic changes are seen within the thoracic spine .
    OUTPUT:
    
Unchanged left lower lobe atelectasis adjacent to a large left - sided hiatal hernia .