نتایج جستجو برای: شاخص dti

تعداد نتایج: 79409  

Journal: :Journal of developmental and behavioral pediatrics : JDBP 2010
Heidi M Feldman Jason D Yeatman Eliana S Lee Laura H F Barde Shayna Gaman-Bean

Diffusion tensor imaging (DTI) is a magnetic resonance imaging technique that allows for the visualization and characterization of the white matter tracts of the brain in vivo. DTI does not assess white matter directly. Rather, it capitalizes on the fact that diffusion is isotropic (equal in all directions) in cerebral spinal fluid and cell bodies but anisotropic (greater in one direction than ...

Journal: :Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography 2005
Jeffrey C Hill Richie A Palma

Mitral annular Doppler tissue imaging (DTI) has been proven to be useful in estimating left ventricular (LV) diastolic filling pressures, and can be applicable to clinical use in adult cardiology. Prior studies have highlighted the technical aspects of DTI and the reproducibility of its measurements; however, recommendations and a systematic approach designed to help sonographers obtain accurat...

Journal: :NeuroImage 2012
Nagesh Adluru Hui Zhang Andrew S. Fox Steven E. Shelton Chad M. Ennis Anne M. Bartosic Jonathan A. Oler Do P. M. Tromp Elizabeth Zakszewski James C. Gee Ned H. Kalin Andrew L. Alexander

Diffusion tensor imaging (DTI) is a powerful and noninvasive imaging method for characterizing tissue microstructure and white matter organization in the brain. While it has been applied extensively in research studies of the human brain, DTI studies of non-human primates have been performed only recently. The growing application of DTI in rhesus monkey studies would significantly benefit from ...

2017
Angela An Qi See Nicolas Kon Kam King

INTRODUCTION Recent advances in surgical imaging include the use of diffusion tensor imaging (DTI) in deep brain stimulation (DBS) and provide a detailed view of the white matter tracts and their connections which are not seen with conventional magnetic resonance imaging. Given that the efficacy of DBS depends on the precise and accurate targeting of these circuits, better surgical planning usi...

Journal: :IEEE Transactions on Medical Imaging 2006

2018
Jie Zhan Tsen-Hsuan Lin Jane E. Libbey Peng Sun Zezhong Ye Chunyu Song Michael Wallendorf Honghan Gong Robert S. Fujinami Sheng-Kwei Song

Hippocampal CA1 inflammation and dendritic loss are common in epilepsy. Quantitative detection of coexisting brain inflammation and injury could be beneficial in monitoring disease progression and assessing therapeutic efficacy. In this work, we used conventional diffusion tensor imaging (DTI, known to detect axonal injury and demyelination) and a novel diffusion basis spectrum imaging (DBSI, k...

2014
Christopher Hancock Byron Bernal Camila Medina Santiago Medina

Purpose: To determine the total direct costs (fixed and variable costs) of diffusion tensor imaging (DTI) and MR tractography reconstruction of the brain. Materials and Methods: The direct fixed and variable costs of DTI with MR tractography were determined prospectively with time and motion analysis in a 1.5-Tesla MR scanner using 15 encoding directions. Seventeen patients with seizure disorde...

2016
Xin-Gui Peng Yingying Bai Judy R James Darya P Shlapak Shenghong Ju

Endothelial progenitor cells (EPCs) play an important role in repairing ischemia tissues. Diffusion tensor imaging (DTI) was applied to detect the architectural organization of skeletal muscle. This study investigated the feasibility and accuracy of using the DTI to evaluate effectiveness of EPCs treatment. Mouse bone marrow-derived EPCs were isolated, cultured, characterized, and transplanted ...

Journal: :Journal of neuroimaging : official journal of the American Society of Neuroimaging 2011
Alp Dinçer Onur Özyurt Dilaver Kaya Elif Koşak Cengizhan Öztürk Canan Erzen M Necmettin Pamir

The aim of the study is to analyze diffusion tensor imaging (DTI) characteristics of the Guillain-Mollaret triangle (GMT) in patients with hypertrophic olivary degeneration (HOD) and to investigate their correlation with previously reported histopathology. DTI was performed in 10 patients diagnosed with HOD. Fractional anisotropy, apparent diffusion coefficient, axial diffusivity, and radial di...

2009
S. Choi D. Cunningham F. Aguila J. Corrigan J. Bogner W. Mysiw D. Chakeres M. V. Knopp P. Schmalbrock

Introduction: Diffusion tensor imaging (DTI) has many promising clinical applications but is limited at ultra-high field. Higher field strengths increase SNR but are more prone to artifacts from B0 and B1 field inhomogeneity and shorter T2*. There are several studies exploring the feasibility of 7T DTI . In DTI applications, accurate measurement of fractional anisotropy (FA) is critical in asse...

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