Neuroimaging techniques offer new perspectives on callosal
... brain tissue do not diffuse equally in all directions. When molecular motion is limited by axonal fiber bundles, water diffusion is highly anisotropic, meaning that diffusion occurs along a particular axis. Water molecules travel roughly six times faster along the length of a fiber process than when ...
... brain tissue do not diffuse equally in all directions. When molecular motion is limited by axonal fiber bundles, water diffusion is highly anisotropic, meaning that diffusion occurs along a particular axis. Water molecules travel roughly six times faster along the length of a fiber process than when ...
Pediatric neuro imaging gets boost from Ingenia
... to several parameters such as FOV, voxel size and slice thickness. The conditions of many of these children are very complex, and require additional sequences, advanced imaging techniques and often repeated imaging to follow complex disease processes.” Advantages of high resolution Dr. Miller says I ...
... to several parameters such as FOV, voxel size and slice thickness. The conditions of many of these children are very complex, and require additional sequences, advanced imaging techniques and often repeated imaging to follow complex disease processes.” Advantages of high resolution Dr. Miller says I ...
Magnetic Susceptibility Tensor: Imaging and Modeling
... Susceptibility tensor can be decomposed into three eigenvalues (principal susceptibilities) and associated eigenvectors. Similar to DTI fiber tractography, fiber tracts can be reconstructed based on STI ...
... Susceptibility tensor can be decomposed into three eigenvalues (principal susceptibilities) and associated eigenvectors. Similar to DTI fiber tractography, fiber tracts can be reconstructed based on STI ...
“Parcelation of the White Matter Using DTI: Insights into the
... however, due to its predominant association fibers is included in the association fiber systems. The commissural system plays an important role in interhemispheric functional integration communicating perceptual, cognitive, learned, and volitional information. The corpus callosum facilitates interhe ...
... however, due to its predominant association fibers is included in the association fiber systems. The commissural system plays an important role in interhemispheric functional integration communicating perceptual, cognitive, learned, and volitional information. The corpus callosum facilitates interhe ...
New frontiers in neuroimaging applications to inborn errors of
... which are captured by rotating gamma camera to produce a 3D image. PET tracers are also administered peripherally, and emit positrons, which collide with electrons to emit two photons in opposite directions, detected by rotating cameras. PET signals are produced when photons separated by 180° are de ...
... which are captured by rotating gamma camera to produce a 3D image. PET tracers are also administered peripherally, and emit positrons, which collide with electrons to emit two photons in opposite directions, detected by rotating cameras. PET signals are produced when photons separated by 180° are de ...
Stochastic fluctuations of the synaptic function
... synapses produced quantal Excitatory PostSynaptic Currents (EPSCs) with peak amplitudes having a 5-65 pA range. The histogram of the peak amplitudes showed a long right tail. If the variability of the postsynaptic response observed in hippocampal neurons should be extended to all the neurons of brai ...
... synapses produced quantal Excitatory PostSynaptic Currents (EPSCs) with peak amplitudes having a 5-65 pA range. The histogram of the peak amplitudes showed a long right tail. If the variability of the postsynaptic response observed in hippocampal neurons should be extended to all the neurons of brai ...
Investigation of glucose diffusion using an optofluidic silicon chip
... glucose levels have significant impact on the human health. Diabetes patients e.g. need external regulation of their blood glucose level through insuline injections. However, before every injection, the exact blood glucose level needs to be determined. To achieve this, we are developing an implantab ...
... glucose levels have significant impact on the human health. Diabetes patients e.g. need external regulation of their blood glucose level through insuline injections. However, before every injection, the exact blood glucose level needs to be determined. To achieve this, we are developing an implantab ...
(< 50 m) non-transfected neurons using laser scanning
... associates with its ‘binders’ in the PSD (Figure S4A and S4B). PSD-95 unbinds with rate constant koff, and binds with rate constant kon. After unbinding, PSD-95 can escape the spine and diffuse along the dendrite to other spines. Short-time diffusion of PSD-95. Here we consider the short-time diffus ...
... associates with its ‘binders’ in the PSD (Figure S4A and S4B). PSD-95 unbinds with rate constant koff, and binds with rate constant kon. After unbinding, PSD-95 can escape the spine and diffuse along the dendrite to other spines. Short-time diffusion of PSD-95. Here we consider the short-time diffus ...
Morphometry of In Vivo Human White Matter Association Pathways
... matter tissues and thus permits the topographic and volumetric characterization of specific regions of the cerebral cortex and subcortical structures in vivo [4]. Developments in diffusion-weighted imaging (DWI) using magnetic resonance have made it possible to measure the diffusivity of MRI visible ...
... matter tissues and thus permits the topographic and volumetric characterization of specific regions of the cerebral cortex and subcortical structures in vivo [4]. Developments in diffusion-weighted imaging (DWI) using magnetic resonance have made it possible to measure the diffusivity of MRI visible ...
Classes of Platyhelminthes
... epidermis covered with cuticle and external suckers or hooks, or both • space between internal organ filled by loose parenchyma ...
... epidermis covered with cuticle and external suckers or hooks, or both • space between internal organ filled by loose parenchyma ...
Use of Diffusion Tensor Images in Glioma Growth Modeling for
... diffusion anisotropy can potentially impact target volumes, a parameterization is needed that matches the following criteria: (1) one single parameter controls the amount of anisotropy, (2) the parameter is interpretable quantitatively, (3) the parameterization results in an intuitive behavior of th ...
... diffusion anisotropy can potentially impact target volumes, a parameterization is needed that matches the following criteria: (1) one single parameter controls the amount of anisotropy, (2) the parameter is interpretable quantitatively, (3) the parameterization results in an intuitive behavior of th ...
Mitigation of Artifacts in T1-weighted Spiral Projection Imaging
... Magnetic Resonance Imaging (MRI) is a proven method of obtaining high resolution, high contrast images of soft tissue. Among the various applications of MRI, T1-weighted contrast imaging is a staple in the diagnosis of many different diseases. Threedimensional (3D) T1-weighted MRI provides additiona ...
... Magnetic Resonance Imaging (MRI) is a proven method of obtaining high resolution, high contrast images of soft tissue. Among the various applications of MRI, T1-weighted contrast imaging is a staple in the diagnosis of many different diseases. Threedimensional (3D) T1-weighted MRI provides additiona ...
Fiber Tracking using Magnetic Resonance Diffusion Tensor Imaging
... proliferate; neuronal connectivity is refined as new synapses form and others are pruned away; and the strength of this connectivity is modulated as neural tracts undergo an ongoing process of myelination that proceeds into adolescence (Dobbing & Sands, 1973). These changes in the strength and direc ...
... proliferate; neuronal connectivity is refined as new synapses form and others are pruned away; and the strength of this connectivity is modulated as neural tracts undergo an ongoing process of myelination that proceeds into adolescence (Dobbing & Sands, 1973). These changes in the strength and direc ...
A new method for measuring the diffusivity of liquid binary mixtures
... measurements of refractive index variation, is well known and in evolution. In recent years holographic methods [14] have replaced the traditional interferometers with considerable advantages, but today the number of routine holographic measures is very small: the time delay between exposure and rec ...
... measurements of refractive index variation, is well known and in evolution. In recent years holographic methods [14] have replaced the traditional interferometers with considerable advantages, but today the number of routine holographic measures is very small: the time delay between exposure and rec ...
Diffusion theory
... One of the most useful approaches for tissuelight interaction is the diffusion approximation, as it can be solved analytically for simple geometries. The diffusion approximation has been used extensively in photon propagation modelling in tissue in the time domain, as well as in the frequency domain ...
... One of the most useful approaches for tissuelight interaction is the diffusion approximation, as it can be solved analytically for simple geometries. The diffusion approximation has been used extensively in photon propagation modelling in tissue in the time domain, as well as in the frequency domain ...
View PDF - CiteSeerX
... ACC, but it can be enlarged or normal and its function and role are still controversial (7, 8). In our cases, slightly thickened AC was seen in one of three patients, but more investigation with larger number of patients is needed for clarifying the fact. As stated by Meyer et al (8), abnormalities ...
... ACC, but it can be enlarged or normal and its function and role are still controversial (7, 8). In our cases, slightly thickened AC was seen in one of three patients, but more investigation with larger number of patients is needed for clarifying the fact. As stated by Meyer et al (8), abnormalities ...
CNS imaging techniques
... (A) Focal lesion in the splenium of the corpus callosum for a 10.8-year-old boy with TBI on conventional T1-weighted MRI midsagittal image. (B) Fiber systems projecting from the corpus callosum using DTI with fiber tracking. Note the absence of identifiable fiber tracks in the posterior regions corr ...
... (A) Focal lesion in the splenium of the corpus callosum for a 10.8-year-old boy with TBI on conventional T1-weighted MRI midsagittal image. (B) Fiber systems projecting from the corpus callosum using DTI with fiber tracking. Note the absence of identifiable fiber tracks in the posterior regions corr ...
Lumalive Evaluation Kit
... Incorporation of Lumalive into fabric items Sample fabrics are included in this Evaluation Kit to illustrate how the Lumalive display panel should be incorporated into a layered fabric item. A product designer aiming to do so should take several factors into account in the choice of fabrics that ar ...
... Incorporation of Lumalive into fabric items Sample fabrics are included in this Evaluation Kit to illustrate how the Lumalive display panel should be incorporated into a layered fabric item. A product designer aiming to do so should take several factors into account in the choice of fabrics that ar ...
Diffusion Tensor Imaging - Psychiatry Neuroimaging Laboratory
... voltage that can be referred to as the MRI signal. Due to intermolecular interactions and also due to field inhomogeneity, the first equally precessing spins start to diphase, resulting in a decay of the T2 signal. Now a 180° radiofrequency pulse is applied to turn the whole spin magnetization aroun ...
... voltage that can be referred to as the MRI signal. Due to intermolecular interactions and also due to field inhomogeneity, the first equally precessing spins start to diphase, resulting in a decay of the T2 signal. Now a 180° radiofrequency pulse is applied to turn the whole spin magnetization aroun ...
Diffusion-Weighted MR Imaging in Brain Tumor
... of primary CNS tumors, accounting for 40–50% of cases and 2–3% of all cancers4. Despite new treatment techniques, patients’ survival still remains very low, varying between 16 and 53 weeks. It is generally accepted that conventional magnetic resonance imaging (MRI) tends to underestimate the extent ...
... of primary CNS tumors, accounting for 40–50% of cases and 2–3% of all cancers4. Despite new treatment techniques, patients’ survival still remains very low, varying between 16 and 53 weeks. It is generally accepted that conventional magnetic resonance imaging (MRI) tends to underestimate the extent ...
MRINeuroanatomy
... where b is a known factor and D is a coefficient that measures (apparent) diffusivity – Can thus compute images of ADC from multiple (2+) scans ...
... where b is a known factor and D is a coefficient that measures (apparent) diffusivity – Can thus compute images of ADC from multiple (2+) scans ...
Mass Transport Laboratory
... be an optical technique where the attenuation of the light passed through a substance depends on the concentration of the species. You will then look at diffusion in a test tube, which will represent one-dimensional diffusion. A critical part of this experiment is the calibration of the optical devi ...
... be an optical technique where the attenuation of the light passed through a substance depends on the concentration of the species. You will then look at diffusion in a test tube, which will represent one-dimensional diffusion. A critical part of this experiment is the calibration of the optical devi ...
3. Facilitated Diffusion (Assisted diffusion) 4. Diffusion Through Ion
... __channel proteins________ which are usually __specific _____ for one type of ion ions are _charged__________ so… o they’re __insoluble_____ in lipids o they can’t get through the __nonpolar interior ______________ of membrane some ion channels are always open; others open and close (gated channels) ...
... __channel proteins________ which are usually __specific _____ for one type of ion ions are _charged__________ so… o they’re __insoluble_____ in lipids o they can’t get through the __nonpolar interior ______________ of membrane some ion channels are always open; others open and close (gated channels) ...
Presentation 14 - Foundations of Human Social
... Cortical thinning could be not entirely due to reduction in size or number of neuronal cell bodies or their synaptic processes, but also in part due to an increase in the myelin coating of fibers (Sowell et al. 2007) i.e. axons look like gray matter until they are myelinated, so measured gray matter ...
... Cortical thinning could be not entirely due to reduction in size or number of neuronal cell bodies or their synaptic processes, but also in part due to an increase in the myelin coating of fibers (Sowell et al. 2007) i.e. axons look like gray matter until they are myelinated, so measured gray matter ...
Diffusion MRI
Diffusion MRI (or dMRI) is a magnetic resonance imaging (MRI) method which came into existence in the mid-1980s. It allows the mapping of the diffusion process of molecules, mainly water, in biological tissues, in vivo and non-invasively. Molecular diffusion in tissues is not free, but reflects interactions with many obstacles, such as macromolecules, fibers, and membranes. Water molecule diffusion patterns can therefore reveal microscopic details about tissue architecture, either normal or in a diseased state.