Impact of 16 weeks cessation on lung function. A Representative axial CT (left) and log(V/Q) (right) images for control (top), cessation (middle), and continuing cigarette smoke exposed (bottom) animals after +16 weeks. Green represents matched V/Q while colours progressing towards purple and red represent increasing values of low and high V/Q, respectively. B Log(V/Q) distributions for animals at +16 weeks. C Average mean log(V/Q) values. D Average log(V/Q) standard deviation values. *p < 0.05, **p < 0.01 by one-way ANOVA with Tukey post-hoc.