Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . The pulmonary vasculature is normal . 4 mm right lower lobe pulmonary nodule is demonstrated . Lungs are clear . No pleural effusion or pneumothorax is present . No acute osseous abnormality is identified .
    OUTPUT:
    
1 . No acute cardiopulmonary abnormality . 2 . 4 mm right lower lobe pulmonary nodule . Chest CT is recommended on a nonemergent basis for further assessment .