Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The mediastinal and hilar contours are stable . Patient is post CABG . Left pacemaker is seen with tips terminating in the right atrium and right ventricle . There are low lung volumes , which account for the apparent new parenchymal opacities . There is no focal consolidation concerning for pneumonia . Pulmonary vasculature is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .