Title :
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
fDate :
31 Oct-6 Nov 1993
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;
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
DOI :
10.1109/NSSMIC.1993.373571
