Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . Trace left pleural effusion is new . No right pleural effusion . Heart size , mediastinal contour , and hila are unremarkable . Visualized osseous structures are notable for multilevel degenerative changes of the thoracic spine with anterior bridging osteophytes , endplate sclerosis and disc space narrowing .
    OUTPUT:
    
1 . New trace left pleural effusion . 2 . No pneumonia .