Results 91 to 100 of about 23,380 (217)

Diffusion Tensor MR Imaging and Fiber Tractography: Theoretic Underpinnings [PDF]

American Journal of Neuroradiology, 2008
In this article, the underlying theory of clinical diffusion MR imaging, including diffusion tensor imaging (DTI) and fiber tractography, is reviewed. First, a brief explanation of the basic physics of diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) mapping is provided.
P, Mukherjee, J I, Berman, S W, Chung, C P, Hess, R G, Henry   +4 more
openaire   +2 more sources

Phybers: a package for brain tractography analysis

Frontiers in Neuroscience
We present a Python library (Phybers) for analyzing brain tractography data. Tractography datasets contain streamlines (also called fibers) composed of 3D points representing the main white matter pathways.
Lazara Liset González Rodríguez, Ignacio Osorio, Alejandro Cofre G., Hernan Hernandez Larzabal, Hernan Hernandez Larzabal, Claudio Román, Cyril Poupon, Jean-François Mangin, Cecilia Hernández, Cecilia Hernández, Pamela Guevara   +10 more
doaj   +1 more source

White matter fiber tracking directed by interpolating splines and a methodological framework for evaluation

Frontiers in Neuroinformatics, 2013
Image-based tractography of white matter (WM) fiber bundles in the brain using diffusion weighted MRI (DW-MRI) has become a useful tool in basic and clinical neuroscience.
Are eLosnegård, Are eLosnegård, Arvid eLundervold, Arvid eLundervold, Erlend eHodneland   +4 more
doaj   +1 more source

Vessel tractography using an intensity based tensor model with branch detection [PDF]

, 2013
In this paper, we present a tubular structure seg- mentation method that utilizes a second order tensor constructed from directional intensity measurements, which is inspired from diffusion tensor image (DTI) modeling.
Cetin, Suheyla, Degertekin, Muzaffer, Demir, Ali, Değertekin, Muzaffer, Unal, Gozde, Yezzi, Anthony, Çetin, Süheyla, Ünal, Gözde   +7 more
core   +1 more source

Offline Reconstruction of Diffusion MRI Acquisitions for Comparison Between Complex PCA‐Based and AI‐Based Denoising

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Optimal diffusion MRI (dMRI) data for image denoising is often unavailable from scanner reconstruction. In this work, we make available an offline reconstruction pipeline for GE dMRI acquisitions, giving access to complex dMRI data. Furthermore, we compare the efficacy of GE HealthCare's AIR‐Recon DL (ARDL), a proprietary convolutional
Francesco D'Antonio, Shaun Warrington, Jose‐Pedro Manzano‐Patron, Paul S. Morgan, Stamatios N. Sotiropoulos   +4 more
wiley   +1 more source

Real-time multi-peak tractography for instantaneous connectivity display

Frontiers in Neuroinformatics, 2014
The computerized process of reconstructing white matter tracts from diffusion MRI (dMRI) data is often referred to as tractography. Tractography is nowadays central in structural connectivity since it is the only non-invasive technique to obtain ...
Maxime eChamberland, Maxime eChamberland, Maxime eChamberland, Kevin eWhittingstall, Kevin eWhittingstall, Kevin eWhittingstall, David eMathieu, David eFortin, David eFortin, Maxime eDescoteaux, Maxime eDescoteaux   +10 more
doaj   +1 more source

Elevated neurofilament light levels in acute anorexia nervosa are associated with alterations in white matter volume and connectivity networks

Journal of Child Psychology and Psychiatry, EarlyView.
Background Anorexia nervosa (AN) is a severe eating disorder associated with drastic reductions in gray and white matter (WM) volume and structural connectivity alterations. However, the hypotheses regarding underlying mechanisms are inconclusive. The current study investigated the relationships of WM volume as well as WM network architecture with ...
Inger Hellerhoff, Daniel Geisler, Fabio Bernardoni, Arne Doose, Friederike I. Tam, David M. Poitz, Nina Chotjewitz, Veit Roessner, Katja Akgün, Tjalf Ziemssen, Stefan Ehrlich   +10 more
wiley   +1 more source

Bundle-specific tractogram distribution estimation using higher-order streamline differential equation

NeuroImage
Streamline tractography locally traces peak directions extracted from fiber orientation distribution (FOD) functions, lacking global information about the trend of the whole fiber bundle. Therefore, it is prone to producing erroneous tracks while missing
Yuanjing Feng, Lei Xie, Jingqiang Wang, Qiyuan Tian, Jianzhong He, Qingrun Zeng, Fei Gao   +6 more
doaj   +1 more source

Directionality of longitudinal associations between frontostriatal structural connectivity and depressive symptoms in adolescent girls

Journal of Child Psychology and Psychiatry, EarlyView.
Background Individual differences in the structure and function of the frontostriatal reward network have been related to depression. However, there is a strong need for prospective, longitudinal studies aiming to understand the role of frontostriatal networks in depression in a developmental context.
Marjolein E.A. Barendse, Chris J. Machle, Rogier Kievit, Jennifer H. Pfeifer   +3 more
wiley   +1 more source

In vivo Diffusion Tensor Magnetic Resonance Tractography of the Sheep Brain: An Atlas of the Ovine White Matter Fiber Bundles

Frontiers in Veterinary Science, 2019
Diffusion Tensor Magnetic Resonance Imaging (DTI) allows to decode the mobility of water molecules in cerebral tissue, which is highly directional along myelinated fibers.
Valentina Pieri, Marco Trovatelli, Marcello Cadioli, Davide Danilo Zani, Stefano Brizzola, Giuliano Ravasio, Fabio Acocella, Mauro Di Giancamillo, Luca Malfassi, Mario Dolera, Marco Riva, Marco Riva, Lorenzo Bello, Lorenzo Bello, Andrea Falini, Antonella Castellano   +15 more
doaj   +1 more source