NDLI: Current dipole localization with an ideal magnetometer system

Content Provider	IEEE Xplore Digital Library
Author	Lutkenhoner, B.
Copyright Year	1964
Abstract	The goal of the study was to explore the most fundamental aspects of a magnetoencephalography (MEG)-based dipole source analysis. For that purpose, a MEG measurement with an ideal magnetometer system (providing the radial component of the magnetic field as a continuous function) is considered. The analytical formulas derived for the variances and covariances of the parameter estimation errors, validated by means of Monte Carlo simulations, allow quantitative predictions in terms of dipole depth, radius and span of the magnetometer system, signal-to-noise (SNR) ratio, and other parameters. A negative correlation exists between radial coordinate and longitudinal component of the moment (perpendicular to radial direction, same plane as actual dipole moment and center of sphere), whereas the other parameters are independent. The standard deviations of the 5 dipole parameters show fundamental differences with respect to their asymptotic behavior for deep dipoles: If the root mean square (rms) value of the magnetic field is kept constant (moment with depth-dependent amplitude), the error for the transverse coordinate (perpendicular to radial and longitudinal coordinate) is proportional to the distance R between dipole and center of sphere, the errors for the other dipole coordinates, and the relative error for the transverse component of the dipole moment are constant, and the relative error for the longitudinal component of the dipole moment follows a 1/R law.
Sponsorship	IEEE Engineering in Medicine and Biology Society
Page Count	13
File Size	1414401
Starting Page	1049
Ending Page	1061
File Format	PDF
ISSN	00189294
Volume Number	43
Issue Number	11
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-11-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetometers Magnetic field measurement Magnetic analysis Magnetic fields Bioinformatics Humans Biomedical measurements Magnetoencephalography Analysis of variance Signal analysis
Content Type	Text
Resource Type	Article
Subject	Biomedical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Maximum-likelihood estimation of current-dipole parameters for data obtained using multichannel magnetometer

The effect of artifact rejection by signal-space projection on source localization accuracy in MEG measurements

Interactions of distant sources of brain magnetic fields: estimation errors of single-dipole model

Current multipole expansion to estimate lateral extent of neuronal activity: a theoretical analysis

Atomic-Signal-Based Zero-Field Finding Technique for Unshielded Atomic Vector Magnetometer

A Magnetometer-Based Approach for Studying Human Movements

Probability-based current dipole localization from biomagnetic fields

DC-SQUID magnetometer system for detecting vector value of magnetic field

A relax-type magnetometer using amorphous ribbon core

Current dipole localization with an ideal magnetometer system

Similar Documents

Maximum-likelihood estimation of current-dipole parameters for data obtained using multichannel magnetometer

The effect of artifact rejection by signal-space projection on source localization accuracy in MEG measurements

Interactions of distant sources of brain magnetic fields: estimation errors of single-dipole model

Current multipole expansion to estimate lateral extent of neuronal activity: a theoretical analysis

Atomic-Signal-Based Zero-Field Finding Technique for Unshielded Atomic Vector Magnetometer

A Magnetometer-Based Approach for Studying Human Movements

Probability-based current dipole localization from biomagnetic fields

DC-SQUID magnetometer system for detecting vector value of magnetic field

A relax-type magnetometer using amorphous ribbon core

Current dipole localization with an ideal magnetometer system