Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are normal . Coronary calcifications are present . Lung volumes are increased , but lungs are grossly clear , and there are no pleural effusions or acute skeletal findings .
    OUTPUT:
    
1 . Hyperexpanded lungs , suggestive of COPD in this patient with history of smoking . 2 . Coronary artery calcifications .