The bronchopulmonary segments are functional regions of the lung supplied by bronchial sudivisions and pulmonary arteries. The right lung has 10 segments: the upper lobe is divided into an apical, an anterior and a posterior segment; the middle lobe is divided into a medial and a lateral segment; and the lower lobe is divided into a superior segment and four basal segments (anterior, medial, lateral, posterior). The left lung has 9 segments: the upper lobe is divided into an apical-posterior segment, an anterior segment, a superior lingular segment and an inferior lingular segment; the lower lobe is divided into a superior segment and three basal (anteromedial, posterior and lateral) segments.

The Slicer Anatomy Lung Segments module contains 3D models of the bronchopulmonary segments of the lung reconstructed from anonymized CT data.