Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unchanged with calcification of the thoracic aorta again re - demonstrated . Pulmonary vasculature is normal . Known left lower lobe nodule measuring 13 mm on the prior CT is not well seen on the current exam . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Remote right - sided rib fractures are again demonstrated .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Left lower lobe pulmonary nodule seen on the prior CT is not well assessed on this exam .