磁共振弥散张量成像(diffusion tensor imaging, DTI) ◆ 实现活体观察组织结构的完整性和连通性,利于对各种疾病引起的白质纤维束的损害程度及范围的判断 ◆ 可用于显示脑白质内神经传导束的走行方向,实现对人的中枢神经纤维精细成像 DTI的彩色扩散张量图 ◆ 根据体素弥散的最大本征向量的方向决定白质纤维走行的原理 ...
Diffusion tensor imaging (DTI) is a powerful magnetic resonance imaging (MRI) technique that enables the measurement of the structural integrity of neural tissue. DTI allows for the visualisation of changes within neural tracts in conditions such as stroke, brain tumours, multiple sclerosis, Parkinson...
Diffusion Tensor Imaging is a noninvasive magnetic resonance imaging technique used to examine brain microstructure. It involves the use of computational imaging algorithms to retrieve quantitative indices of brain water diffusion, such as fractional anisotropy, to characterize tissue microstructure and detect...
Diffusion imaging focuses on the micromovements (random, brownian) of the water molecules inside voxels. These motions encounter different obstacles in the body (cell membranes, proteins, macromolecules, fibers…), which vary according to the tissues and certain pathological modifications (intracellular e...
In particular, diffusion tensor imaging (DTI) may be used to map and characterize the three-dimensional diffusion of water as a function of spatial location.1, 2 The diffusion tensor describes the magnitude, the degree of anisotropy, and the orientation of diffusion anisotropy. Estimates of white...
The diffusion tensor imaging model assumes that, in each voxel, there is a unique orientation of the fibers, the direction of which is represented by the tensor’s main eigenvector (Mori and Tournier, 2013). This assumption is not valid in case of crossing fibers. The term “crossing fibers...
DTI Studio可以导入DICOM或NIFTI两种文件的格式；NIFTI有时会用着用着就报错，建议使用DICOM格式的文件。
磁共振弥散成像技术是目前在活体上测量水分子弥散运动与成像的唯一方法,最常用的主要包括弥散加权成橡(diffusion weighted imaging,DWI)和弥散张量成像(diffusion tensor imaging,DTI)。DTI在中枢神经系统尤其对白质和灰质的区别以及白质纤维的走行有很好...
磁共振弥散成像技术是目前在活体上测量水分子弥散运动与成像的唯一方法,最常用的主要包括弥散加权成橡(diffusion weighted imaging,DWI)和弥散张量成像(diffusion tensor imaging,DTI)。DTI在中枢神经系统尤其对白质和灰质的区别以及白质纤维的走行有很好的...
模式II显示患侧纤维FA值相对于对侧明显降低，提示可能发生了瘤周水肿，但不能完全排除肿瘤侵入的可能性。模式III的特征是患侧纤维FA值相对于对侧明显减低，同时纤维走向发生改变，提示瘤周纤维可能已被肿瘤侵入。模式IV表现为患侧纤维显示各向同性或近似同性，无法辨别走行方向，这可能意味着肿瘤破坏了瘤周...