scholarly journals Normal Pancreas Graft Appearance in Magnetic Resonance Diffusion Tensor Imaging (DTI)

2020 ◽  
Vol 26 ◽  
Author(s):  
Agnieszka Surowiecka ◽  
Michał Frączek ◽  
Bartosz Mruk ◽  
Marta Matejak-Górska ◽  
Jerzy Walecki ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
Magnetic Resonance ◽  
Diffusion Tensor ◽  
Normal Pancreas ◽  
Diffusion Tensor Imaging Dti ◽  
Pancreas Graft

scholarly journals Magnetic resonance diffusion tensor imaging in psychiatry: a narrative review of its potential role in diagnosis

2020 ◽  
Author(s):  
Piotr Podwalski ◽  
Krzysztof Szczygieł ◽  
Ernest Tyburski ◽  
Leszek Sagan ◽  
Błażej Misiak ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
White Matter ◽  
Magnetic Resonance ◽  
Potential Role ◽  
Diffusion Tensor ◽  
Mean Diffusivity ◽  
Water Molecules ◽  
Mental Diseases ◽  
The Brain ◽  
Diffusion Tensor Imaging Dti

Abstract Diffusion tensor imaging (DTI) is an imaging technique that uses magnetic resonance. It measures the diffusion of water molecules in tissues, which can occur either without restriction (i.e., in an isotropic manner) or limited by some obstacles, such as cell membranes (i.e., in an anisotropic manner). Diffusion is most often measured in terms of, inter alia, fractional anisotropy (FA), mean diffusivity (MD), radial diffusivity (RD), and axial diffusivity (AD). DTI allows us to reconstruct, visualize, and evaluate certain qualities of white matter. To date, many studies have sought to associate various changes in the distribution of diffusion within the brain with mental diseases and disorders. A better understanding of white matter integrity disorders can help us recognize the causes of diseases, as well as help create objective methods of psychiatric diagnosis, identify biomarkers of mental illness, and improve pharmacotherapy. The aim of this work is to present the characteristics of DTI as well as current research on its use in schizophrenia, affective disorders, and other mental disorders.

scholarly journals MR Parameter Map Suite: ITK Classes for Calculating Magnetic Resonance T2 and T1 Parameter Maps

2008 ◽  
Author(s):  
Don Bigler ◽  
Mark Meadowcroft ◽  
Xiaoyan Sun ◽  
Jeffrey Vesek ◽  
Alex Dresner ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
Magnetic Resonance ◽  
Diffusion Tensor ◽  
Non Invasive ◽  
Mr Diffusion ◽  
Mr Diffusion Tensor Imaging ◽  
Diffusion Tensor Imaging Dti

This document describes a suite of new multi-threaded classes for calculating magnetic resonance (MR) T2 and T1 parameter maps implemented using the Insight Toolkit ITK (www.itk.org). Similar to MR diffusion tensor imaging (DTI), MR T2 and T1 parameter maps provide a non-invasive means for quantitatively measuring disease or pathology in-vivo. Included in the suite are classes for reading proprietary Bruker 2dseq and Philips PAR/REC images and example programs and data for validating the new classes.

scholarly journals Repetitive mild traumatic brain injury in mice triggers a slowly developing cascade of long-term and persistent behavioral deficits and pathological changes

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Xiaoyun Xu ◽  
Matthew Cowan ◽  
Flavio Beraldo ◽  
Amy Schranz ◽  
Patrick McCunn ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Diffusion Tensor ◽  
Diffuse Axonal Injury ◽  
Synaptic Proteins ◽  
Resonance Spectroscopy ◽  
Pathological Changes ◽  
Diffusion Tensor Imaging Dti

AbstractWe have previously reported long-term changes in the brains of non-concussed varsity rugby players using magnetic resonance spectroscopy (MRS), diffusion tensor imaging (DTI) and functional magnetic imaging (fMRI). Others have reported cognitive deficits in contact sport athletes that have not met the diagnostic criteria for concussion. These results suggest that repetitive mild traumatic brain injuries (rmTBIs) that are not severe enough to meet the diagnostic threshold for concussion, produce long-term consequences. We sought to characterize the neuroimaging, cognitive, pathological and metabolomic changes in a mouse model of rmTBI. Using a closed-skull model of mTBI that when scaled to human leads to rotational and linear accelerations far below what has been reported for sports concussion athletes, we found that 5 daily mTBIs triggered two temporally distinct types of pathological changes. First, during the first days and weeks after injury, the rmTBI produced diffuse axonal injury, a transient inflammatory response and changes in diffusion tensor imaging (DTI) that resolved with time. Second, the rmTBI led to pathological changes that were evident months after the injury including: changes in magnetic resonance spectroscopy (MRS), altered levels of synaptic proteins, behavioural deficits in attention and spatial memory, accumulations of pathologically phosphorylated tau, altered blood metabolomic profiles and white matter ultrastructural abnormalities. These results indicate that exceedingly mild rmTBI, in mice, triggers processes with pathological consequences observable months after the initial injury.

scholarly journals Gry wideo a zmiany strukturalne mózgu

Kosmos ◽  
2020 ◽  
Vol 69 (1) ◽  
pp. 233-241
Author(s):  
Natalia Kowalczyk ◽  
Aneta Brzezicka
Keyword(s):  
Magnetic Resonance Imaging ◽  
Diffusion Tensor Imaging ◽  
Magnetic Resonance ◽  
Diffusion Tensor ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri ◽  
Diffusion Tensor Imaging Dti

Mimo iż gry wideo, zwane również grami komputerowymi, nie powstały, aby uczyć to stanowią płaszczyznę do badania neuroplastyczności czyli zdolności mózgu do ,,przeprogramowywania się?? w wyniku specyficznego doświadczenia. Badania donoszą, iż regularne granie w gry komputerowe, w szczególności gry akcji, poprawia głównie podstawowe zdolności poznawcze, takie jak szybkość reagowania, wrażliwość na kontrast czy selektywność i podzielność uwagi. Pojedyncze badania pokazują poprawę funkcji wykonawczych. Mniej wiadomo natomiast nt. neuronalnych podstaw tego rodzaju poprawy. W niniejszym artykule podsumowujemy wyniki badań, w których przeprowadzano pomiary strukturalnych zmian mózgu w wyniku doświadczenia z grami komputerowymi. Zestawione zostały badania wykorzystujące głównie dwie metody badania plastyczności mózgu - morfometrii bazującej na wokselach (ang. based morphometry, VBM) istoty szarej oraz obrazowanie tensora dyfuzji (ang. diffusion tensor imaging, DTI) w istocie białej. Badania zmian strukturalnych mózgu z użyciem rezonansu magnetycznego (magnetic resonance imaging, MRI) dostarczają kolejnych przykładów na potencjalne korzyści płynące z grania w gry komputerowe.

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