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  1. Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine
  2. Year: 2005, Volume: 53
  3. Year: 2005, Volume: 53, Issue: 1
  4. Visualization of Tensor Fields Using Superquadric Glyphs
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Sodium Magnetic Resonance Imaging of Chemotherapeutic Response in a Rat Glioma
Preliminary Investigation of Respiratory Self-Gating for Free-Breathing Segmented Cine MRI
Visualization of Tensor Fields Using Superquadric Glyphs
Motion-Corrected Free-Breathing Delayed Enhancement Imaging of Myocardial Infarction
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Visualization of Tensor Fields Using Superquadric Glyphs

Content Provider PubMed Central
Author Ennis, Daniel B. Gordon, Kindlman Rodriguez, Ignacio Helm, Patrick A. Mcveigh, Elliot R.
Abstract The spatially varying tensor fields that arise in magnetic resonance imaging are difficult to visualize due to the multivariate nature of the data. To improve the understanding of myocardial structure and function a family of objects called glyphs, derived from superquadric parametric functions, are used to create informative and intuitive visualizations of the tensor fields. The superquadric glyphs are used to visualize both diffusion and strain tensors obtained in canine myocardium. The eigensystem of each tensor defines the glyph shape and orientation. Superquadric functions provide a continuum of shapes across four distinct eigensystems (λi, sorted eigenvalues), λ1 = λ2 = λ3 (spherical), λ1 < λ2 = λ3 (oblate), λ1 > λ2 = λ3 (prolate), and λ1 > λ2 > λ3 (cuboid). The superquadric glyphs are especially useful for identifying regions of anisotropic structure and function. Diffusion tensor renderings exhibit fiber angle trends and orthotropy (three distinct eigenvalues). Visualization of strain tensors with superquadric glyphs compactly exhibits radial thickening gradients, circumferential and longitudinal shortening, and torsion combined. The orthotropic nature of many biologic tissues and their DTMRI and strain data require visualization strategies that clearly exhibit the anisotropy of the data if it is to be interpreted properly. Superquadric glyphs improve the ability to distinguish fiber orientation and tissue orthotropy compared to ellipsoids.
Related Links http://dx.doi.org/10.1002/mrm.20318
Ending Page 176
Page Count 8
Starting Page 169
File Format PDF
ISSN 07403194
Journal Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine
Issue Number 1
Volume Number 53
Language English
Publisher Date 2005-01-01
Access Restriction Open
Subject Keyword Radiology Nuclear Medicine and imaging Research in Higher Education
Content Type Text
Resource Type Article
Subject Radiology, Nuclear Medicine and Imaging
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