Estimation of the spatio-temporal correlations of biological electrical sources from their magnetic fields

Author

Smith, Warren E.

Author_Institution

Inst. of Opt., Rochester Univ., NY, USA

Volume

39

Issue

10

fYear

1992

Firstpage

997

Lastpage

1004

Abstract

A general formulation linking the spatial and temporal coherence of measurable magnetic fields with the corresponding spatial and temporal coherence of the inaccessible current sources is derived in the quasi-static model. A method for reconstructing the spatial and temporal coherence of the source distribution is presented. Such coherence maps would be useful descriptors of physiological processes occurring over time and space, and would represent more information than an image of the current sources frozen in time, or even a temporal sequence of such images.

Keywords

bioelectric phenomena; biomagnetism; biological electrical sources; coherence maps; current sources; magnetic fields; physiological processes; quasi-static model; source distribution; spatial coherence; spatio-temporal correlations; temporal coherence; Biomedical measurements; Biomedical optical imaging; Coherence; Computed tomography; Magnetic field measurement; Magnetic variables measurement; Motion pictures; Optical sensors; Spatial resolution; X-ray imaging; Electroencephalography; Electromagnetic Fields; Electrophysiology; Models, Theoretical; Nervous System Physiology;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.161331

Filename

161331