Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left pectoral pacemaker is unchanged with two leads terminating in the right atrium and right ventricle . The cardiac silhouette remains mildly enlarged , but stable . The mediastinal and hilar contours are within normal limits , with calcification of the aortic knob again noted . The pulmonary vasculature is not engorged . Mild streaky bibasilar opacities are most compatible with atelectasis . No focal consolidation concerning for pneumonia is detected . There is no pleural effusion or pneumothorax . Multilevel degenerative changes of the thoracic spine are noted .
    OUTPUT:
    
No acute cardiopulmonary process .