采样球体方向分布：一种在灰度图像上量化小梁骨结构的有效方法。

Sampling Sphere Orientation Distribution: an efficient method to quantify trabecular bone fabric on grayscale images.

作者信息

Varga P, Zysset P K

机构信息

Institute of Lightweight Design and Structural Biomechanics, Vienna University of Technology, Vienna, Austria.

出版信息

Med Image Anal. 2009 Jun;13(3):530-41. doi: 10.1016/j.media.2009.02.007. Epub 2009 Mar 6.

DOI:10.1016/j.media.2009.02.007

PMID:19332377

Abstract

A novel Sampling Sphere Orientation Distribution (SSOD) method based on mobile sampling spheres is developed for describing microstructural anisotropy of trabecular bone using grayscale images. Efficient implementation of SSOD on segmented and unsegmented 3D microCT images of human trabecular bone samples from different anatomical locations is demonstrated. The second order fabric tensor of SSOD corresponds well with the one derived from the mean intercept length (MIL) method applied on segmented images. The results of SSOD are extended to higher order fabric approximations and the effect of sampling sphere radius is examined. Finally, performance of the method on artificial microstructures is presented.

摘要

开发了一种基于移动采样球的新型采样球取向分布（SSOD）方法，用于使用灰度图像描述松质骨的微观结构各向异性。展示了SSOD在来自不同解剖位置的人体松质骨样本的分割和未分割3D微CT图像上的有效实现。SSOD的二阶结构张量与应用于分割图像的平均截距长度（MIL）方法得出的张量非常吻合。SSOD的结果扩展到更高阶的结构近似，并研究了采样球半径的影响。最后，展示了该方法在人工微观结构上的性能。