Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size appears borderline enlarged . The aorta is mildly tortuous and diffusely calcified . Mediastinal and hilar contours are otherwise unremarkable . Crowding of bronchovascular structures is present as a result of low lung volumes . Attenuation of pulmonary vascular markings towards the upper lobes is compatible with underlying emphysema . Patchy opacities in the lung bases may reflect areas of atelectasis . No pleural effusion or pneumothorax is demonstrated . Patient is status post kyphoplasty of a mid and lower thoracic vertebral body .
    OUTPUT:
    
Low lung volumes . Patchy opacities in the lung bases may reflect atelectasis , but infection is not excluded in the correct clinical setting . Emphysema .