【摘 要】
:
In this paper, texture analysis was used to discriminate digital chest radiographs of pneumoconiosis patients from normal ones.First, lung fields in each chest radiograph were segmented by using the m
【机 构】
:
Class 2009 of Biomedical Engineering, Capital Medical University, Beijing 100069, China
【出 处】
:
首都医科大学生物医学工程学科学术年会
论文部分内容阅读
In this paper, texture analysis was used to discriminate digital chest radiographs of pneumoconiosis patients from normal ones.First, lung fields in each chest radiograph were segmented by using the morphological reconstruction and Otsu-thresholding.Second, several texture features based on the histogram and co-occurrence matrix of grey levels were extracted.Finally, a neural network based classifier was trained with features extracted from 66 chest images to distinguish pneumoconiosis patients from normal cases.Another 29 images were used to assess the diagnosis performance of the classifier, giving an overall accuracy of 79.3%.
其他文献
目的:研究大腿截肢患者在行走过程中站立中期时相下残肢的受力情况,为建立完整的大腿接受腔测量与评估系统提供基础.方法:首先根据计算机断层扫描图像三维重建大腿截肢患者的骨骼、肌肉软组织和接受腔的三维模型,考虑步行中关节角度变化进行组装.然后,建立模拟步态周期中站立中期时相受力的有限元模型,对模型进行预应力影响下非线性大变形有限元分析.结果:当考虑了步行中关节角度变化和预应力的影响以后,计算的接触法向界
目的:建立一种腰椎间盘突出症力学特征数值计算分析模型,为腰椎间盘突出症的力学机理提供一种检测评估方法.方法:利用健康成人L4~L5腰椎运动节段CT影像资料,采用Mimics10.01医学图像处理软件和Geomagic10.0逆向工程软件分别建立L4~L5腰椎运动节段的椎骨和椎间盘,并在Ansys软件中附加腰椎相关韧带及通过改变椎间盘突出后对应的材料属性, 建立腰椎L4~L5运动节段有限元模型,构建
目的:建立人体L3-L5腰椎节段的有限元模型,在轴向正压力、前弯、侧弯、后伸及旋转五种下,研究椎间盘的生物力学特性.方法:利用健康成人L3~L5腰椎运动节段CT影像资料, 采用Mimics1 0.01医学图像处理软件和Geomagic10.0逆向工程软件分别建立L3~L5腰椎运动节段的椎骨和椎间盘,并在Ansys软件中附加腰椎相关韧带及通过改变椎间盘突出后对应的材料属性, 建立腰椎L3~L5运动节
目的:通过对不同年龄段肥胖儿童自然行走过程中步态参数的比较,探讨年龄对肥胖儿童步态的影响.方法:采用0.5米footscan(R)USB平板测试系统(比利时RSscan International公司)对儿童自然行走时的步态进行测试;并应用SPSS 11.0,对所得数据进行统计学处理.结果:(1)与7~8岁肥胖儿童相比,9~10岁肥胖儿童在行走过程中,足跟着地时间减短,全足支撑期变长;在足底Ⅱ-Ⅴ
The aim of this article is to study the texture features of corpus callosum in patients with Alzheimers disease (AD) and normal controls based on magnetic resonance images.Then explore the texture dif
The atrophic changes in mild cognitive impairment (MCI) have been proposed as biomarkers for detection and monitoring.This paper analyzed magnetic resonance imaging (MRI) to identify the atrophy regio
Purpose: To compare the diagnostic performances of artificial neural networks (ANNs) and multivariable logistic regression (LR) analyses for differentiating between malignant and benign lung nodules o
The four-fibre family constitutive relation has been used to capture the mechanical behaviour of arterial walls under biaxial loading conditions.This study shows that the material parameters of the fo
Objective: The HIV viral load set point has long been used as a prognostic marker of disease progression and more recently as an end-point parameter in HIV vaccine clinical trials.The definition of se
Objective To segment lung fields on digital chest radiographs automatically.Methods A morphological reconstruction filter was first applied to the original image to eliminate the local grey level extr