Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided dual - chamber pacemaker device is noted with leads terminating in unchanged positions , in the right atrium and right ventricle . Heart size is normal with dense mitral annular calcifications re - demonstrated . The aorta is diffusely calcified . Mediastinal and hilar contours are unchanged . Assessment of the lung apices is obscured by the patient 's chin and soft tissues of the neck projecting over this region . Lung volumes are low . There is crowding of the bronchovascular structures without overt pulmonary edema . Mild bibasilar atelectasis is demonstrated . No focal consolidation , pleural effusion or pneumothorax is seen . There are mild multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Low lung volumes with mild bibasilar atelectasis .