WebCrossed cerebellar diaschisis (CCD) is a well recognized phenomenon following cerebral infarction (4,5), in which reductions in both blood flow and metabolism in the … WebFeb 18, 2024 · Anisotropy Measurements from the Near-Threshold Photodissociation of the N2−NO Complex We have used velocity map ion imaging to measure the angular anisotropy of the NO (A) products from the photodissociation of the N2−NO complex. Our experiment ranged from 108 to 758 cm−1above the threshold energy to form NO …
Anisotropy Measurements from the Near-Threshold …
WebRecent MRI studies have focused attention on white matter abnormalities in schizophrenia using diffusion tensor imaging (DTI). Indices commonly derived from DTI include (a) … WebSep 29, 2024 · This anisotropy was controlled with femtosecond light pulses, leading to strong modulation of the intensity and a more than 60° rotation of the polarization state of a signal light pulse, a ... 19徐艳
Diffusion MRI - Wikipedia
WebRESULTS: Changes in anisotropy in patients were quantified by using fractional anisotropy because it provided the best performance in terms of contrast-to-noise ratio as a function of signal-to-noise ratio in simulations. The anisotropy of ischemic white matter decreased (P = .01). WebFeb 15, 2024 · The quantities S k and b k ⃗ are the signal and b-value of the k th diffusion gradient, Φ k is the angle between the k th diffusion gradient and the principal direction of the anisotropic tensor, λ and λ ⊥ are the axial and radial diffusivities of the anisotropic tensor, f is the signal intensity fraction for the anisotropic tensor, and a and b are the … WebDiffusion tensor imaging (DTI) is a relatively novel modality used in neuroimaging. It is used to assess white matter integrity. DTI is based on the characterization of tissue diffusivity as represented through axial and radial diffusivity. That is ultimately translated as a measure named fractional anisotropy (FA), which ranges from 0 to 1. 19徐雅