Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . Heart size is mildly enlarged but not substantially changed from the previous study . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . No focal consolidation , pleural effusion or pneumothorax is present . Minimal atelectasis is noted in the lung bases . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes with minimal bibasilar atelectasis .