CAJ | 학술논문

为解决传统最小代价路径算法提取血管中心线时存在偏向血管侧壁的问题，提出一种基于点的中心线校正方法。应用最小代价路径算法初步提取中心线，然后根据血管剖面灰阶值呈高斯分布的特点对每个中心点进行校正，再利用三次B样条将离散的中心点拟合为一条连续的中心线。实验结果表明，该算法提取的中心线更靠近血管的中心处，且对噪声具有鲁棒性。此外，将该算法用于起点、终点位置的校正，则提取的中心线对用户定义点的位置不敏感。
위해결전통최소대개로경산법제취혈관중심선시존재편향혈관측벽적문제，제출일충기우점적중심선교정방법。응용최소대개로경산법초보제취중심선，연후근거혈관부면회계치정고사분포적특점대매개중심점진행교정，재이용삼차B양조장리산적중심점의합위일조련속적중심선。실험결과표명，해산법제취적중심선경고근혈관적중심처，차대조성구유로봉성。차외，장해산법용우기점、종점위치적교정，칙제취적중심선대용호정의점적위치불민감。
Applying the traditional minimum cost path algorithm to find the centerline through bend vessel yields a biased path which closes to the one side of vessel wall. To solve this problem, a centering method based on points is proposed. The centerline is extracted preliminary by minimum cost path algorithm, then the center point is corrected by gray Gauss-ian curve fitting, and a smoothed centerline is obtained finally by using cubic B-spline fitting to the discrete corrected points. The experimental results show that this method is robust to the noise and the extracted centerline is closer to the center of vessel at the areas of high curvature. Besides, this centerline is not sensitive to the user-defined points by apply-ing the centering method to correct the position of start-point and end-point.