نتایج جستجو برای: شاخص dti

تعداد نتایج: 79409  

2013
Yurui Gao Ann S. Choe Iwona Stepniewska Xia Li Malcolm J. Avison Adam W. Anderson

Diffusion tensor imaging (DTI) tractography provides noninvasive measures of structural cortico-cortical connectivity of the brain. However, the agreement between DTI-tractography-based measures and histological 'ground truth' has not been quantified. In this study, we reconstructed the 3D density distribution maps (DDM) of fibers labeled with an anatomical tracer, biotinylated dextran amine (B...

Journal: :Journal of neurology, neurosurgery, and psychiatry 2007
Zhijian Liang Jinsheng Zeng Sirun Liu Xueying Ling Anding Xu Jian Yu Li Ling

BACKGROUND Secondary degeneration of the pyramidal tract distal to the primary lesion after a stroke has been detected by some studies using diffusion tensor imaging (DTI) but its potential clinical significance and the degeneration of the fibre tract proximal to the primary lesion have received little attention. METHODS Twelve patients underwent DTI on the 1st, 4th and 12th week following a ...

2017
Hsing‐Ching Kuo Claudio L Ferre Jason B Carmel Jaimie L Gowatsky Arielle D Stanford Stefan B Rowny Sarah H Lisanby Andrew M Gordon Kathleen M Friel

AIM To determine whether diffusion tensor imaging (DTI) can be an independent assessment for identifying the corticospinal tract (CST) projecting from the more-affected motor cortex in children with unilateral spastic cerebral palsy (CP). METHOD Twenty children with unilateral spastic CP participated in this study (16 males, four females; mean age 9y 2mo [standard deviation (SD) 3y 2mo], Manu...

Journal: :Neuropsychobiology 2008
Bart D Peters Lieuwe de Haan Nienke Dekker Jorik Blaas Hiske E Becker Peter M Dingemans Erik M Akkerman Charles B Majoie Therèse van Amelsvoort Gerard J den Heeten Don H Linszen

There is increasing evidence of white matter pathology in schizophrenia. The aim of this study was to examine whether white matter abnormalities found with diffusion tensor imaging (DTI) in previous schizophrenia studies are present in the early phase of the illness. DTI was performed at 3 T on 10 male patients with a first (n = 8) or second (n = 2) psychotic episode of schizophrenia or schizoa...

Journal: :NeuroImage 2018
Raimo A. Salo Ilya Belevich Eppu Manninen Eija Jokitalo Olli Gröhn Alejandra Sierra

Diffusion tensor imaging (DTI) reveals microstructural features of grey and white matter non-invasively. The contrast produced by DTI, however, is not fully understood and requires further validation. We used serial block-face scanning electron microscopy (SBEM) to acquire tissue metrics, i.e., anisotropy and orientation, using three-dimensional Fourier transform-based (3D-FT) analysis, to corr...

Journal: :Technology and innovation 2016
Lauren E Salminen Thomas E Conturo Jacob D Bolzenius Ryan P Cabeen Erbil Akbudak Robert H Paul

Technological advances over recent decades now allow for in vivo observation of human brain tissue through the use of neuroimaging methods. While this field originated with techniques capable of capturing macrostructural details of brain anatomy, modern methods such as diffusion tensor imaging (DTI) that are now regularly implemented in research protocols have the ability to characterize brain ...

2016
Leah H Suttner Amanda Mejia Blake Dewey Pascal Sati Daniel S Reich Russell T Shinohara

Diffusion tensor imaging (DTI) has become the predominant modality for studying white matter integrity in multiple sclerosis (MS) and other neurological disorders. Unfortunately, the use of DTI-based biomarkers in large multi-center studies is hindered by systematic biases that confound the study of disease-related changes. Furthermore, the site-to-site variability in multi-center studies is si...

Journal: :Journal of Alzheimer's disease : JAD 2013
Yu Zhang Maria Carmela Tartaglia Norbert Schuff Gloria C Chiang Christopher Ching Howard J Rosen Maria Luisa Gorno-Tempini Bruce L Miller Michael W Weiner

Brain magnetic resonance imaging (MRI) studies have demonstrated regional patterns of brain macrostructural atrophy and white matter microstructural alterations separately in the three major subtypes of frontotemporal lobar degeneration (FTLD), which includes behavioral variant frontotemporal dementia (bvFTD), semantic dementia (SD), and progressive nonfluent aphasia (PNFA). This study was to i...

2017
Weifei Wu Jie Liang Ying Chen Aihua Chen Yongde Wu Zong Yang

Diffusion tensor imaging (DTI) has been widely used to visualize peripheral nerves, but the microstructure of compressed nerve roots can be assessed using DTI. However, there are no data regarding the association among microstructural changes evaluated using DTI, the symptoms assessed using the Oswestry Disability Index (ODI) and the duration of symptoms after surgery in patients with lumbar di...

Journal: :AJNR. American journal of neuroradiology 2013
M B Hulkower D B Poliak S B Rosenbaum M E Zimmerman M L Lipton

SUMMARY The past decade has seen an increase in the number of articles reporting the use of DTI to detect brain abnormalities in patients with traumatic brain injury. DTI is well-suited to the interrogation of white matter microstructure, the most important location of pathology in TBI. Additionally, studies in animal models have demonstrated the correlation of DTI findings and TBI pathology. O...

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