Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest show over expansion of the lungs consistent with underlying COPD . There are no consolidations or pleural effusions . The heart is at the upper limits of normal for size . There is no pulmonary edema . There is mild calcification of the aortic arch . There are degenerative changes of the thoracic spine .
    OUTPUT:
    
No evidence of pneumonia . Over inflation of the lungs consistent with underlying COPD .