Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette size is borderline enlarged . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Lung volumes are slightly low . There is minimal atelectasis at the lung bases . No focal consolidation , pleural effusion or pneumothorax is seen . DISH is re - demonstrated within the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .