Relationship between emphysema and COPD

A 66-year-old female with a 50 pack/year history of cigarette smoking had a CT scan and was diagnosed with emphysema. He asks if this means he has chronic obstructive pulmonary disease (COPD).
Question:

  1. There is a clear relationship between emphysema and COPD, explain the pathophysiology of emphysema and the relationship to COPD.