CAJ | 학술논문

针对腹部复杂的内部结构、各组织之间存在相互浸润,使得腹部磁共振(Magnetic resonance, MR)图像存在大量弱边缘的问题,以及使用传统水平集(Level set)方法对肝脏进行分割时易在弱边缘处产生泄露,采取阈值分割等算法进行预处理以获取更好的分割效果,并使用一种改进的水平集方法分割提取三维腹部 MR 图像中的肝脏。使用阈值分割进行粗分割可以有效减少干扰,将粗分割的结果进行亮度映射,增强边缘信息,然后将预分割的结果作为初始水平集,使用改进的水平集方法对其进行进一步分割。实验证明多种算法的有效结合能够改善传统水平集分割方法在弱边缘处过度演化的问题,获得较为理想的分割效果,拓展了水平集方法的应用。
침대복부복잡적내부결구、각조직지간존재상호침윤,사득복부자공진(Magnetic resonance, MR)도상존재대량약변연적문제,이급사용전통수평집(Level set)방법대간장진행분할시역재약변연처산생설로,채취역치분할등산법진행예처리이획취경호적분할효과,병사용일충개진적수평집방법분할제취삼유복부 MR 도상중적간장。사용역치분할진행조분할가이유효감소간우,장조분할적결과진행량도영사,증강변연신식,연후장예분할적결과작위초시수평집,사용개진적수평집방법대기진행진일보분할。실험증명다충산법적유효결합능구개선전통수평집분할방법재약변연처과도연화적문제,획득교위이상적분할효과,탁전료수평집방법적응용。
Aiming at the complicated internal structure of abdomen and the mutual infiltration between or-ganizations,an improvement of level set method is used to extract the 3D abdomen magnetic resonance image segmentation of liver area.Level set method is easy to leak in weak edges.Therefore,this prob-lem is solved by preprocessing threshold segmentation.Certain interference in further processing is re-duced and the edges is more clear through remapping the intensity of pre-segmentation results,and then the improved level set method is used for further segmentation.Experiments proves that the method is superior to traditional level set methods.The leaking problem of weak edges is reduced,and the desired segmentation result is obtained.The applicability of level set is expended.