نتایج جستجو برای: computed magnetic gradient tensor

تعداد نتایج: 681845  

2013
Rodrigo Moreno Magnus Borga Eva Klintström Torkel Brismar Örjan Smedby Joao Manuel Tavares

Anisotropy measurements of 15 trabecular bone biopsies from the radius estimated by different fabric tensors on images acquired through cone beam computed tomography (CBCT) and micro computed tomography (micro-CT) are compared. The results show that the generalized mean intercept length (MIL) tensor performs better than the global gray-scale structure tensor (GST), especially when the von Mises...

2015
Taufiq K. A. Khairuddin Paul D. Ledger William R. B. Lionheart

This paper presents a few properties of the polarization tensor for conducting and magnetic objects to describe and classify the objects. In order to achieve this, the polarization tensor of the objects are numerically determined by the previous hp-FEM method. We then focus on the polarization tensor for magnetic but non-conducting objects. After that, the polarization tensor for translated and...

2009
T. M. Aliev

The magnetic dipole moments of the light tensor mesons f2, a2 and strange K∗0 2 (1430) tensor meson are calculated in the framework of the light cone QCD sum rules. It is observed that the values of the magnetic dipole moment for the charged tensor particles are considerably different from zero. These values are very close to zero for the light neutral f2 and a2 tensor mesons, while it has a sm...

2013
Hui Dong Longqing Qiu Wen Shi Baolin Chang Yang Qiu Lu Xu Chao Liu Yi Zhang Hans-Joachim Krause Andreas Offenhäusser Xiaoming Xie

2002
KARL-HEINZ RÄDLER

The mean electromotive force that occurs in the framework of mean–field magnetohydrodynamics is studied for cases in which magnetic field fluctuations are not only due to the action of velocity fluctuations on the mean magnetic field. The possibility of magnetic field fluctuations independent of a mean magnetic field, as they may occur as a consequence of a small–scale dynamo, is taken into acc...

2005
S. Boretius J. Wuerfel F. Zipp T. Watanabe J. Frahm T. Michaelis

Introduction In theory, the NMR signal is expected to scale more than linearly with magnetic field strength [1]. On the other hand, practical MRI applications such as diffusion tensor imaging (DTI) using echo-planar imaging (EPI) are also affected by a marked reduction of T2 and T2* relaxation times, the latter referring to enhanced magnetic field inhomogeneities with corresponding geometric di...

Journal: :Ima Journal of Numerical Analysis 2023

Abstract This work analyses a high-order hybridizable discontinuous Galerkin (HDG) method for the linear elasticity problem in domain not necessarily polyhedral. The is approximated by polyhedral computational where HDG solution can be computed. introduction of rotation as one unknowns allows us to use gradient displacements obtain an explicit representation boundary data domain. transferred fr...

Journal: :International journal of radiation oncology, biology, physics 2012
Christopher H Chapman Vijaya Nagesh Pia C Sundgren Henry Buchtel Thomas L Chenevert Larry Junck Theodore S Lawrence Christina I Tsien Yue Cao

PURPOSE To determine whether early assessment of cerebral white matter degradation can predict late delayed cognitive decline after radiotherapy (RT). METHODS AND MATERIALS Ten patients undergoing conformal fractionated brain RT participated in a prospective diffusion tensor magnetic resonance imaging study. Magnetic resonance imaging studies were acquired before RT, at 3 and 6 weeks during R...

2016
Juba Bouaziz Samir Lounis Stefan Blügel Peter Grünberg Hiroshi Ishida

A microscopic expression of the residual electrical resistivity tensor is derived in linear response theory for Rashba electrons scattering at a magnetic impurity with cylindrical or noncylindrical potential. The behavior of the longitudinal and transversal residual resistivity is obtained analytically and computed for an Fe impurity at the Au(111) surface. We studied the evolution of the resis...

2009
S-E. Kim K. C. Goodrich S. M. Moon J. Hadley D. L. Parker

INTRODUCTION: Diffusion Tensor Imaging (DTI) techniques have improved due to increased magnetic field strength and improved RF and gradient coil performance. Further improvement in gradient performance could be used to shorten the echotrain duration or increase the number of echoes in the same duration and thereby be of substantial benefit for high resolution DTI acquisition. Although, insert g...

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