Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . There is minimal atelectasis in the left lung base . Lungs are otherwise clear without focal consolidation . No pleural effusion or pneumothorax is present . There are hypertrophic changes in the lower thoracic spine
    OUTPUT:
    
Minimal atelectasis in the left lung base .