Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Moderate size hiatal hernia is re - demonstrated . Mediastinal and hilar contours are otherwise unchanged . Pulmonary vasculature is normal . Minimal atelectasis is noted in the left lung base . No focal consolidation , pleural effusion or pneumothorax is present . There are moderate multilevel degenerative changes within the thoracic spine .
    OUTPUT:
    
Unchanged moderate hiatal hernia with minimal left basilar atelectasis .