Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The aortic knob is calcified . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is within normal limits . Faint nodular opacity within the right lung base measuring up to 12 mm is unchanged compared to the prior study . Lungs are hyperinflated . No focal consolidation , pleural effusion or pneumothorax is present . Scarring within the lung apices is present . Mild reduction of height of a low thoracic vertebral body is unchanged .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Nodular opacity projecting over the right lung base is unchanged compared to the prior study , and is unlikely to reflect a nipple shadow . CT is recommended for further evaluation on a non-emergent basis .