Results 21 to 30 of about 1,385,486 (215)
Nosotchu, 2004 脳には白質線維の方向による水の拡散のしやすさの違い(拡散異方性diffusion anisotropy)があり,条件を満たした撮像を行い,テンソルを用いて解析すると,白質による拡散異方性の程度(白質によりどれだけ水分子が白質の方向に沿って動きやすく,白質と直交する方向に動きにくいかの程度)が定量化でき,さらに白質線維の方向も知ることができる.我々は拡散テンソルデータから白質線維による異方性を高速に追跡して拡散テンソルから見た"白質路"を描出するソフトを開発し,その臨床応用を行った.錐体路近傍の急性期脳梗塞においては,拡散テンソルtractographyにより,錐体路と梗塞との3次元的関係がより明瞭に描出され,予後予想に役立つことが示された.脳動静脈奇形などの脳血管障害 ...
Aoki, Shigeki +3 more
openaire +2 more sources
The Egyptian Journal of Radiology and Nuclear Medicine, 2023 Background Radiological diagnosis of cervical spondylotic myelopathy should be made as early as possible to obtain favourable clinical outcomes when compared with later stages.
Naglaa Said AbdEL-Azim Mostafa +3 more
doaj +1 more source
Diffusion Tensor Tractography of the Facial Nerve [PDF]
Otolaryngology–Head and Neck Surgery, 2012 Objective1) Demonstrate that preoperative diffusion tensor (DT) tractography can predict the displacement of the facial nerve in the vicinity of vestibular schwannomas. 2) Demonstrate that the course of the constructed tract consistently agreed with the surgical findings in most of the cases.MethodProspective study of 15 patients undergoing surgical ...
Pedro A. Escada +3 more
openaire +1 more source
Optic radiation fiber tractography in glioma patients based on high angular resolution diffusion imaging with compressed sensing compared with diffusion tensor imaging - initial experience. [PDF]
PLoS ONE, 2013 OBJECTIVE: Up to now, fiber tractography in the clinical routine is mostly based on diffusion tensor imaging (DTI). However, there are known drawbacks in the resolution of crossing or kissing fibers and in the vicinity of a tumor or edema.
Daniela Kuhnt +4 more
doaj +1 more source
Neurologia i Neurochirurgia Polska, 2022 The aims of this study were to assess the prognosis of patients after a single haemorrhage from the cavernoma, and also in the case of rehaemorrhage, and to determine the indications for surgical treatment of brainstem cavernomas.The study included a group of 35 patients with brainstem cavernomas, 23 women and 12 men aged 27 to 57 years (mean age 38.4).
Krzysztof, Majchrzak +3 more
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Performance of unscented Kalman filter tractography in edema: Analysis of the two-tensor model
NeuroImage: Clinical, 2017 Diffusion MRI tractography is increasingly used in pre-operative neurosurgical planning to visualize critical fiber tracts. However, a major challenge for conventional tractography, especially in patients with brain tumors, is tracing fiber tracts that ...
Ruizhi Liao +8 more
doaj +1 more source
A MATLAB toolbox for muscle diffusion-tensor MRI tractography
Journal of Biomechanics, 2021 Diffusion-tensor MRI fiber tractography has been used to reconstruct skeletal muscle architecture, but remains a specialized technique using custom-written data processing routines. In this work, we describe the public release of a software toolbox having the following design objectives: accomplish the pre-processing tasks of file input, image ...
Damon, Bruce M. +7 more
openaire +2 more sources
European Journal of Radiology Open, 2018 Tractography studies for pre-surgical planning of primary brain tumors is typically done using diffusion tensor imaging (DTI), which cannot resolve crossing, kissing or highly angulated fibres.
Joao Leote +4 more
doaj +1 more source
Structural network efficiency is associated with cognitive impairment in small-vessel disease. [PDF]
, 2014 To characterize brain network connectivity impairment in cerebral small-vessel disease (SVD) and its relationship with MRI disease markers and cognitive impairment.METHODS: A cross-sectional design applied graph-based efficiency analysis to deterministic
Lawrence, AJ +14 more
core +1 more source
Frontiers in Neuroscience, 2016 Purpose: Diffusion MRI provides a non-invasive way of estimating structural connectivity in the brain. Many studies have used diffusion phantoms as benchmarks to assess the performance of different tractography reconstruction algorithms and assumed that ...
Sarah D. Lichenstein +5 more
doaj +1 more source