一种基于区域生长算法的脊椎椎体提取方法

脊椎椎体三维重建是脊椎应力应变研究的重要环节,对MRI图像中脊椎椎体区域的提取是三维重建的基础。为了准确提取脊椎椎体区域,提出了一种基于区域生长算法的脊椎椎体提取方法。通过最大类间方差法求得到自适应阈值代替传统区域生长算法中的手动阈值,再结合中值滤波算法对原始图像进行预处理,避免了传统区域生长算法手动阈值造成的过分割,或者欠分割等现象;并有效抑制MRI图像噪声,使椎体区域内像素变化更为缓和,弥补了传统区域生长在MRI图像椎体区域内部分割效果不佳的缺陷,准确提取出脊椎椎体并建立出三维模型。

Vertebral extraction method based on region growing algorithm

Spinal three dimensional modeling is a fundamental research of biomedical, 3 d modeling based on the basis of original MRI in detection precision of the spine area, in order to successfully extract the spine area, puts forward a spine extraction method based on region growing algorithm, through the between-cluster variance method to get the adaptive threshold instead of manual valve value in traditional region growing algorithm, combining median filter algorithm to the original image preprocessing, overcomes the traditional region growing algorithm caused by the manual threshold segmentation or owe segmentation problems, also can effectively suppress MRI image noise, let vertebral region pixels change more ease, to make up for the shortage of the traditional region growing on MRI image segmentation, finally can accurately extract the MRI spinal vertebral.