Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right lung asymmetry is unchanged and due to prior right upper lobectomy . Unchanged right lung base opacity , likely due to right middle lobe parenchymal scarring . Chronic bullous changes in the bilateral lower lobes , and right fourth rib healed fracture are stable , along with cardiomegaly and aortic atherosclerotic disease . No new focal consolidations concerning for pneumonia .
    OUTPUT:
    
No evidence of pneumonia . Stable postsurgical changes as described above .