نتایج جستجو برای: diffusion tensor imaging

تعداد نتایج: 626965  

Journal: :Current Protocols in Magnetic Resonance Imaging 2004

Journal: :journal of medical signals and sensors 0

diffusion weighted imaging uses the signal loss associated with the random thermal motion of water molecules in the presence of magnetic field gradients to derive a number of parameters that reflect the translational mobility of the water molecules in tissues. with a suitable experimental set-up, it is possible to calculate all the elements of the local diffusion tensor (dt) and derived paramet...

Journal: :European journal of radiology 2003
Yoshitaka Masutani Shigeki Aoki Osamu Abe Naoto Hayashi Kuni Otomo

Recently, diffusion tensor imaging is attracting the biomedical researchers for its application in depiction of fiber tracts based on diffusion anisotropy. In this paper, we briefly describe the basic theory of diffusion tensor MR imaging, the determination process of diffusion tensor, and the basic concepts of diffusion tensor visualization techniques. Several results of clinical application i...

Journal: :iranian journal of radiology 0
ihab elaff computer engineering department, faculty of engineering, adnan menderes university, aydin, turkey; computer engineering department, faculty of engineering, adnan menderes university, aydin, turkey. tel: +90-2562137503, fax: +90-2562136686

materials and methods the segmentation process is evaluated using four different clustering methods with different number of clusters where some dti scalar indices for 10 human brains are processed. results the aim was to produce results with less segmentation error and a lower computational cost while attempting to minimizing boundary overlapping and minimizing the effect of artifacts due to m...

2014
José G. Raya

Assessment of the integrity of the articular cartilage is considered key for the early diagnosis of osteoarthritis (OA). Diffusion-weighted imaging and diffusion tensor imaging have potential as biomarkers for cartilage composition and structure. The value of diffusion to detect compositional and structural changes in the cartilage matrix has been shown in ex vivo experiments for several years....

Journal: :Imaging in medicine 2010
Jiangyang Zhang

Diffusion tensor imaging has been increasingly used for studying white matter pathology in rodent models of neurological diseases. Here, applications of diffusion tensor imaging in detecting major and subtle white matter pathology in the mouse CNS are reviewed, followed by several technical details that may be helpful in designing studies that involve diffusion tensor imaging of rodent brain an...

Journal: :Magnetic resonance in medicine 2014
Aurobrata Ghosh Tristan Milne Rachid Deriche

PURPOSE Diffusion kurtosis imaging (DKI) is a recent improvement over diffusion tensor imaging that characterizes tissue by quantifying non-gaussian diffusion using a 3D fourth-order kurtosis tensor. DKI needs to consider three constraints to be physically relevant. Further, it can be improved by considering the Rician signal noise model. A DKI estimation method is proposed that considers all t...

Journal: :Neurology India 2007
Machado Calixto Rodríguez Rafael Korein Julius

2014
Joonas Arttu Autio R. Edward Roberts

1 Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland 2 Department of Diagnostics, Faculty of Medicine, University of Oulu, Oulu, Finland 3 Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland 4 Division of Brain Sciences, Academic Department of Neuro-otology, Imperial College London, Charing Cross Hospital Campus, London, UK *Corr...

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