Segmentation of Pulmonary Vascular Trees from Thoracic 3D CT Images
Figure 6
Eight distinct regions were delineated based upon their radial distance from the hilum. Two points were manually placed in each lung as landmarks denoting the hilum and the lung was three-dimensionally divided into a total of eight regions depending on the distance from the hilar points. Note that this interaction step is only used for the validation purposes.
