Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Comparison of gradient encoding schemes for diffusion-tensor MRI.

K M Hasan1, D L Parker, A L Alexander

  • 1Department of Physics, University of Utah, Salt Lake City, Utah, USA.

Journal of Magnetic Resonance Imaging : JMRI
|May 1, 2001
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

New Zealand White Rabbits Fed High Cholesterol Diets Develop Morbid Systemic Diseases before Intracranial Atherosclerosis is Detected.

Journal of veterinary science & medical diagnosis·2026
Same author

Characterising the transcriptomic response of bovine peripheral blood mononuclear cells to a mycobacterial cell wall fraction.

Molecular immunology·2024
Same author

The innate immune stimulant Amplimune® is safe to administer to young feedlot cattle.

Australian veterinary journal·2022
Same author

Improving image quality in transcranial magnetic resonance guided focused ultrasound using a conductive screen.

Magnetic resonance imaging·2021
Same author

Sensitive Detection of Infratentorial and Upper Cervical Cord Lesions in Multiple Sclerosis with Combined 3D FLAIR and T2-Weighted (FLAIR3) Imaging.

AJNR. American journal of neuroradiology·2020
Same author

Disrupted inhibitory plasticity and homeostasis in Fragile X syndrome.

Neurobiology of disease·2020
Same journal

Editorial for "Association Between Deep Gray Matter Iron Deposition Dysregulation and Cognitive Performance in Type 2 Diabetes Mellitus Patients: A Quantitative Susceptibility Mapping Study".

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Association Between Deep Gray Matter Iron Deposition Dysregulation and Cognitive Performance in Type 2 Diabetes Mellitus Patients: A Quantitative Susceptibility Mapping Study.

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Association of Iron and Myelin Alterations in the Contralesional Dentate Nucleus and Thalamus With Functional Outcome in Acute Ischemic Stroke: A Susceptibility Source Separation Study.

Journal of magnetic resonance imaging : JMRI·2026
Same journal

A Quantitative Modification of VI-RADS for Bladder Cancer at the Ureteral Orifice: A Reader Study on MRI With Varying Experience Levels.

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Editorial for "Integrating nnU-Net Segmentation and Clinical-Radiomics for Multicenter Prediction of Soft Tissue Sarcoma Grade and Ki-67 Expression".

Journal of magnetic resonance imaging : JMRI·2026
Same journal

Structural MRI Volumetry Index for Differentiation of Progressive Supranuclear Palsy From Parkinson's Disease and Multiple System Atrophy by Automatic Segmentation: A Comparison With Magnetic Resonance Parkinsonism Index.

Journal of magnetic resonance imaging : JMRI·2026
See all related articles

The icosahedron scheme is optimal for diffusion tensor MRI (DT-MRI) encoding with six directions. Using more directions offers no significant advantage if an optimal six-direction scheme is employed.

Area of Science:

  • Medical Imaging
  • Biophysics

Background:

  • Diffusion tensor magnetic resonance imaging (DT-MRI) accuracy is influenced by the chosen encoding scheme.
  • Various encoding strategies exist, including heuristic, numerically optimized, and regular polyhedra schemes.

Purpose of the Study:

  • To compare the diffusion tensor accuracy of different DT-MRI encoding strategies.
  • To identify optimal encoding schemes for DT-MRI measurements.

Main Methods:

  • Analytical comparisons and Monte Carlo simulations were used.
  • Encoding strategies evaluated included heuristic, numerically optimized (minimum tensor variance, minimum force, minimum potential energy, minimum condition number), and regular polyhedra (icosahedron variations) schemes.
  • The accuracy of schemes with six and more encoding directions was assessed.

Related Experiment Videos

Main Results:

  • The icosahedron scheme demonstrated optimal accuracy for six encoding directions.
  • Numerically optimized schemes (MV, MF, ME) for six directions were functionally equivalent to the icosahedron scheme.
  • Commonly used heuristic schemes with six directions were found to be suboptimal.
  • For more than six directions, several methods, including regular polyhedra and numerical optimization solutions, generated equivalent optimal directions.
  • A specific heuristic scheme with seven directions was also found to be optimal.

Conclusions:

  • An optimal six-direction encoding scheme provides sufficient accuracy for DT-MRI.
  • There is no significant benefit in using more than six encoding directions if an optimal scheme is utilized.
  • Further studies are needed to validate these findings in future DT-MRI applications.