The bronchopulmonary segments are functional regions of the lung supplied by bronchial sudivisions and pulmonary arteries. Each main bronchus divides into secondary bronchi that supply the lobes of the lung. The right bronchus divides into a superior, a middle and an inferior lobar bronchus. The left bronchus divides into a superior and an inferior lobar bronchus. Each lobar bronchus divides into tertiary bronchi that supply the bronchopulmonary segments. 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 Bronchopulmonary Segments atlas contains 3D models of the bronchopulmonary segments of the lung reconstructed from anonymized CT data. To access the atlas, please fill in the contact form.