Fig. 2
a Three-dimensional, (b) axial, and (c) coronal imaging illustrating the predominantly apical distribution of pulmonary 18fluorodeoxyglucose ([18F]-FDG) uptake in a patient with usual chronic obstructive pulmonary disease (COPD). d The color scale gives the spectrum applied to the full range of [18F]-FDG uptake, so that each color band represents a range of 10% of the maximum signal, with the maximum signal represented by white and the minimum signal by black. (Reprinted from [58] with permission of the American Thoracic Society. Copyright © 2017 American Thoracic Society)