Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate enlargement of cardiac silhouette . A moderate to large hiatal hernia is present with air - fluid level noted . The aorta is tortuous and diffusely calcified . The pulmonary vasculature is normal . Linear opacities in the lung bases likely reflect subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . There are moderate multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Subsegmental bibasilar atelectasis . Moderate to large hiatal hernia .