|
|||||
|
|
| MRI中髋关节股头软骨的厚度测量方法 | |
| 引用本文： | 曹宇,赵杰,程远志,闫继宏. MRI中髋关节股头软骨的厚度测量方法[J]. 电子科技大学学报(社会科学版), 2009, 0(4) |
| 作者姓名： | 曹宇 赵杰 程远志 闫继宏 |
| 作者单位： | 哈尔滨工业大学机器人技术与系统国家重点实验室;哈尔滨工业大学计算机学院; |
| 基金项目： | 国家863计划(2006AA04Z245) |
| 摘 要： | 为了实现对核磁共振成像中髋关节软骨厚度的自动检测,该文提出了基于结合高斯滤波的零交叉点的自动测量方法。模拟人体髋关节股头软骨的厚度分布,建立二维薄面体的数学模型。引入了模拟MR图像摄影过程的点扩散函数模型,可以模拟出沿薄面体法线方向MR仿真信号的强度波形。利用基于高斯二阶微分的零交叉法可以实现对薄面体厚度的准确测量,定义薄面体的厚度为沿着薄面体法线方向的高斯二阶微分的两个零交叉点之间的距离。薄面体模型仿真和实物标本实验均验证了该方法的有效性。 |
| 关 键 词： | 软骨 数学模型 核磁共振成像 点扩散函数 厚度测量 |
Thickness Measurement of Femoral Cartilage on Hip Joint in MRI |
|
| CAO Yu,ZHAO Jie,CHENG Yuan-zhi,, YAN Ji-hong. Thickness Measurement of Femoral Cartilage on Hip Joint in MRI[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 2009, 0(4) | |
| Authors: | CAO Yu ZHAO Jie CHENG Yuan-zhi YAN Ji-hong |
| Affiliation: | 1. State Key Laboratory of Robotics and System;Harbin Institute of Technology Harbin 150080;2. School of Computer Science;Harbin Institute of Technology Weihai Shandong 264209 |
| Abstract: | A novel method, which is based on the zero-crossing points combined with Gaussian filter, is developed to estimate the cartilage thickness of hip joint automatically in magnetic resonance imaging (MRI). A 2D mathematical model for simulating human hip joint femoral cartilage distribution is founded. Based on the model, a point spread function (PSF) is applied to simulate the MR imaging process, and then the one-dimensional profile of MR intensity values along the normal direction of the sheet structure can ... |
| Keywords: | cartilage mathematical models MRI point spread function thickness measurement |
| 本文献已被 CNKI 等数据库收录！ | |