偏头痛是一种严重危害人类健康的脑疾病,其中无先兆偏头痛在临床中占比最多且诊断困难。当前无先兆偏头痛辅助诊断算法研究中,基于机器学习的脑影像功能连接分析方法是最主要的研究方向。由于此类方法多依赖于预定义的脑图谱模板,受模...偏头痛是一种严重危害人类健康的脑疾病,其中无先兆偏头痛在临床中占比最多且诊断困难。当前无先兆偏头痛辅助诊断算法研究中,基于机器学习的脑影像功能连接分析方法是最主要的研究方向。由于此类方法多依赖于预定义的脑图谱模板,受模板选择主观因素及分类器性能影响,现有方法的智能化程度和准确率较低,难以满足临床及研究需求。基于设计的新型3D-CNN技术,提出了一种无先兆偏头痛智能辅助诊断算法MwoA3D-Net(3D convolutional neural network based diagnosis of migraine without aura)。该算法采用组信息指导的独立成分分析方法,生成被试的静息态脑网络,并以此作为输入训练MwoA3D-Net,实现对无先兆偏头痛患者与健康对照的自动诊断,可避免因先验模板不同导致的结果差异。在算法设计中引入3D数据增强、L1和L2正则化等一系列优化策略,可有效防止过拟合现象的发生。在60名无先兆偏头痛和65名健康被试数据集上的实验结果表明,MwoA3DNet的平均诊断准确率为98.40%,鲁棒性较高,且所选静息态脑功能网络均具有较强的辨识性,可作为无先兆偏头痛的潜在生物标志物用于个体化诊断。展开更多
Three-dimensional medical image visualization becomes an essential part for medical field, including computer aided diagnosis, surgery planning and simulation, artificial limb surgery, radiotherapy planning, and teach...Three-dimensional medical image visualization becomes an essential part for medical field, including computer aided diagnosis, surgery planning and simulation, artificial limb surgery, radiotherapy planning, and teaching etc. In this paper, marching cubes algorithm is adopted to reconstruct the 3-D images for the CT image sequence in DICOM format under theVC＋＋6.0 and the visual package VTK platform. The relatively simple interactive operations such as rotation and transfer can be realized on the platform. Moreover, the normal vector and interior point are calculated to form the virtual clipping plane, which is then used to incise the 3-D object. Information of the virtual slice can be obtained, in the mean while the virtual slice images are displayed on the screen. The technique can realize the real time interaction extraction of virtual slice on 3-D CT image. The cuboids structured can be zoomed, moved and eircumrotated by operating mouse to incise the 3-D reconstruction object. Real time interaction can be realized by clipping the reconstruction object. The coordinates can be acquired by the mouse clicking in the 3D space, to realize the point mouse pick-up as well angle and distance interactive measurement. We can get quantitative information about 3-D images through measurement.展开更多
文摘偏头痛是一种严重危害人类健康的脑疾病,其中无先兆偏头痛在临床中占比最多且诊断困难。当前无先兆偏头痛辅助诊断算法研究中,基于机器学习的脑影像功能连接分析方法是最主要的研究方向。由于此类方法多依赖于预定义的脑图谱模板,受模板选择主观因素及分类器性能影响,现有方法的智能化程度和准确率较低,难以满足临床及研究需求。基于设计的新型3D-CNN技术,提出了一种无先兆偏头痛智能辅助诊断算法MwoA3D-Net(3D convolutional neural network based diagnosis of migraine without aura)。该算法采用组信息指导的独立成分分析方法,生成被试的静息态脑网络,并以此作为输入训练MwoA3D-Net,实现对无先兆偏头痛患者与健康对照的自动诊断,可避免因先验模板不同导致的结果差异。在算法设计中引入3D数据增强、L1和L2正则化等一系列优化策略,可有效防止过拟合现象的发生。在60名无先兆偏头痛和65名健康被试数据集上的实验结果表明,MwoA3DNet的平均诊断准确率为98.40%,鲁棒性较高,且所选静息态脑功能网络均具有较强的辨识性,可作为无先兆偏头痛的潜在生物标志物用于个体化诊断。
基金National 973 Basic Research Program of Chinagrant number:2010CB732600+4 种基金Major Research Equipment Fund of the Chinese Academy of Sciences and Knowledge Innovation Project of the Chinese Academy of Sciences,2008 Shenzhen Controversial Technology Innovation Research Projectsgrant number:FG200805230224AConcentration plan of innovation sources of Shenzhen-R&D projects of international cooperation on science and technologygrant number:ZYA200903260065ANatural Science Foundation of Guangdong Province,China 8478922035-X0007007
文摘Three-dimensional medical image visualization becomes an essential part for medical field, including computer aided diagnosis, surgery planning and simulation, artificial limb surgery, radiotherapy planning, and teaching etc. In this paper, marching cubes algorithm is adopted to reconstruct the 3-D images for the CT image sequence in DICOM format under theVC＋＋6.0 and the visual package VTK platform. The relatively simple interactive operations such as rotation and transfer can be realized on the platform. Moreover, the normal vector and interior point are calculated to form the virtual clipping plane, which is then used to incise the 3-D object. Information of the virtual slice can be obtained, in the mean while the virtual slice images are displayed on the screen. The technique can realize the real time interaction extraction of virtual slice on 3-D CT image. The cuboids structured can be zoomed, moved and eircumrotated by operating mouse to incise the 3-D reconstruction object. Real time interaction can be realized by clipping the reconstruction object. The coordinates can be acquired by the mouse clicking in the 3D space, to realize the point mouse pick-up as well angle and distance interactive measurement. We can get quantitative information about 3-D images through measurement.
