Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes accentuates the size of the cardiac silhouette which appears mildly enlarged . The aorta is tortuous . Mediastinal and hilar contours are otherwise unremarkable . Pulmonary vasculature is not engorged . Minimal streaky atelectasis is noted in the lung bases without focal consolidation . No pleural effusion or pneumothorax is present . Moderate multilevel degenerative changes are seen within the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .