A neuromagnetic source localization using 64 channel SQUID system and MRI

Author

Mino, Kazuhiro ; Masakiyo, Fumiaki ; Niki, Noboru ; Nishitani, Hiromu ; Tamura, Itsuro

Author_Institution

Dept. of Inf. Sci., Tokushima Univ., Japan

fYear

1993

fDate

31 Oct-6 Nov 1993

Firstpage

1652

Abstract

Describes a high-resolution biomagnetic inverse problem using 64 channel SQUID system and MRI. If a head shape is approximated by a sphere, Geselowitz´s equation to estimate the biomagnetic field can be simplified. After corresponding the coordinates of SQUID system to the coordinates of MRI, a sphere model and search space are extracted from the MRI data, and the current sources are localized using the improved simplex method. Each current dipole location is combined with the anatomical MRI data

Keywords

SQUID magnetometers; biomedical NMR; inverse problems; magnetoencephalography; 64 channel SQUID system; Geselowitz´s equation; MRI; MRI coordinates; biomagnetic field estimation; current sources localization; head shape; high-resolution biomagnetic inverse problem; improved simplex method; neuromagnetic source localization; search space; sphere; sphere model; Biomagnetics; Current measurement; Equations; Inverse problems; Magnetic field measurement; Magnetic heads; Magnetic resonance imaging; Matrix decomposition; SQUIDs; Shape;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1993., 1993 IEEE Conference Record.

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-1487-5

Type

conf

DOI

10.1109/NSSMIC.1993.373571

Filename

373571