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

Selective minimum-norm solution of the biomagnetic inverse problem

K Matsuura1, Y Okabe

  • 1Research Center for Advanced Science and Technology, University of Tokyo, Japan.

IEEE Transactions on Bio-Medical Engineering
|June 1, 1995
PubMed
Summary

A novel multidipole estimation method offers a sparse solution for biomagnetic inverse problems. This approach identifies key dipole moments, enhancing source localization accuracy in biomagnetism research.

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

Pharmacological effects of SA96 (bucillamine) and its metabolites as immunomodulating drugs--the disulfide structure of SA-96 metabolites plays a critical role in the pharmacological action of the drug.

International journal of immunopharmacology·1998
Same author

Properties and tissue distribution of mouse monomeric carbonyl reductase.

Biological & pharmaceutical bulletin·1998
Same author

[Prognosis in the cases with renal cell carcinoma according to clinical parameters].

Nihon Hinyokika Gakkai zasshi. The japanese journal of urology·1998
Same author

Sequence of the cDNA of a human dihydrodiol dehydrogenase isoform (AKR1C2) and tissue distribution of its mRNA.

The Biochemical journal·1998
Same author

Interaction site for soluble cytochromes on the tetraheme cytochrome subunit bound to the bacterial photosynthetic reaction center mapped by site-directed mutagenesis.

Biochemistry·1998
Same author

[Intraoperative local infusion chemotherapy (ILIC) for gastric cancer].

Gan to kagaku ryoho. Cancer & chemotherapy·1998

Area of Science:

  • Biophysics
  • Biomagnetism
  • Computational Neuroscience

Background:

  • The biomagnetic inverse problem seeks to determine the location and strength of neural activity from measured magnetic fields.
  • Existing methods often struggle with non-uniqueness and spatial resolution limitations.
  • Sparse solutions are desirable for accurately pinpointing neural sources.

Purpose of the Study:

  • To propose a new multidipole estimation method for solving the biomagnetic inverse problem.
  • To achieve a sparse and accurate representation of neural sources.
  • To explore the efficacy of different Lp-norm solutions.

Main Methods:

  • Extraction of solutions from basic feasible solutions of linearly independent data equations.
  • Selection of a number of dipole moments equal to the number of magnetic sensors.

Related Experiment Videos

  • Iterative search for the minimum-norm vector of selected moments across different Lp-norms (p = 2, 1, 0.5, 0.2).
  • Utilizing Linear Programming for unique computation of the L1-norm solution.

    • Main Results:

    • The proposed method yields practically sparse solutions.
    • Computer simulations demonstrate that Lp-norm solutions (especially L1-norm) identify a small number of significant moments near actual source-dipoles.
    • The L1-norm solution is equivalent to the minimum-L1-norm solution of the original inverse problem.
    • The method allows for unique computation via Linear Programming.

    Conclusions:

    • The novel multidipole estimation method effectively provides sparse solutions for the biomagnetic inverse problem.
    • This technique enhances the spatial resolution and accuracy of source localization in biomagnetic studies.
    • The L1-norm approach, computable via Linear Programming, offers a robust and unique solution.