Fig. 1

a, b Chest computed tomography revealing a 15-mm tumor in the left posterior basal bronchus (dotted circle) and the pulmonary ligament (white arrow). c–e Preparation of a reconstructed 3-D pulmonary model of patients with metastatic lung tumor. The red color indicates the pulmonary arteries, blue color indicates the pulmonary veins, yellow color indicates the trachea and bronchi, and black color indicates the tumor (arrow head) and the pulmonary ligament (arrows).