3He center slice static ventilation, ADC, and morphometry maps. Hyperpolarized 3He static ventilation, ADC, and morphometry maps for two representative older never-smokers and two ex-smokers. ADC, apparent diffusion coefficient; r, internal airway radius; R, external airway radius. NS-01: female, 77 years old; FEV1%pred = 91; VDP = 1.5%; ADC = 0.24 cm2/sec; RA950 = 0.75%. NS-15: female, 69 years old; FEV1%pred = 91; VDP = 2.4%; ADC = 0.20 cm2/sec; RA950 = 0.44%. EnE-03: male, 62 years old; FEV1%pred = 70; VDP = 9.1%; ADC = 0.29 cm2/sec; RA950 = 4.0%. E-02: male, 79 years old; FEV1%pred = 126; VDP = 16%; ADC = 0.42 cm2/sec; RA950 = 11%.