Baseline performance of airway measures for commonly used reconstruction parameter combinations, full DFOV with the standard kernel, and 100 mA s. (a) Wall thickness (top left), (b) inner diameter (top right), (c) outer diameter (bottom left), and (d) wall area percentage (bottom right). “Small”, “medium”, and “large” airways are defined based on inner diameter of 2.5, 3, and 6 mm, respectively.