Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No interval change in the ill - defined right upper lobe opacity . Lungs are otherwise clear with normal pleural surfaces . Lungs are slightly hyperexpanded with flattening of the diaphragms , which may be suggestive of COPD . Heart size , mediastinal contour and hila are normal . No bony abnormality .
    OUTPUT:
    
1 . No interval change in right upper lobe opacity . 2 . Hyperexpanded lungs with flattened diaphragms may be suggestive of COPD .