Pulmonary Lobe Segmentation in CT Images Based on Lung Anatomy Knowledge

Figure 4

Pulmonary arteries and veins. (a) Pulmonary arteries always adhered with pulmonary veins, and pulmonary veins may cross lobar fissures. (b) The local image corresponding to (a). As shown in the region labeled with yellow arrows, pulmonary arteries and veins are joined together. Furthermore, pulmonary veins may cross pulmonary fissures.