Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable with post CABG changes and enlargement of the pulmonary artery . There is no pleural effusion or pneumothorax . The lungs are well expanded with emphysematous changes and scarring in the right middle and lower lobes . Known left upper lobe lesion is better assessed on recent CT . The upper abdomen is unremarkable with partial visualization of an aortic stent graft .
    OUTPUT:
    
No acute cardiopulmonary process . Known left upper lobe lesion is better appreciated on recent CT .