Pulmonary vessel for X-RAY CT images segmented through canny level-set

A method of level-set 3D segmentation for the pulmonary vessel was proposed using CANNY. The Level-set segmentation was based on geometric active contour models instead of parameter active contour models. The method overcame the obscurity of pulmonary vessel's boundary by taking advantage of the structure of conforming anatomic arrange of threshold. Further, the initial segmented results preprocessed were applied using anisotropic diffusion and the real border of vessel was detected using CANNY. Finally, the vessel was finely segmented using the level-set method. Thus, the segmentation of pulmonary vessel could be done more accurately. In addition, a judging scheme of branching node of pulmonary vessel tree was proposed on level-set basis.