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Apparatus-and-method-for-displaying-electrical-activity-generated-within-a-living-body

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Apparatus and method for displaying electrical activity generated within a living body

Details

Inventors: Raviv, Gil; Pal, Ivan; Koester, Dean; Kripal, David; Towle, James N.;
Assignee: Bio-Logic Systems Corporation (Mundelein, IL)
Primary Examiner: Jaworski; Francis
Assistant Examiner:
Attorney, Agent or Firm: Niro, Scavone, Haller & Niro, Ltd.

An apparatus and method for display of biologically induced electrical activity is disclosed. The apparatus includes sensors for measuring EEG or MEG signals from a living body and using these signals to compute one or more dipoles representative of the measured electrical activity. Values of the electrical activity may also be computed for discrete locations in or on the body. The operator has the ability to input a variety of different computational specifications or criteria to facilitate dipole computation. The resulting computed data may be selectively displayed as a dipole within a three-dimensional representation of the body, as a movie-like series of dipoles, as a composite or tracing of dipoles or as various topographic maps. The operator also has the ability to change the display to provide different perspective views or to enlarge the displayed scene.

DETAILED DESCRIPTION The present invention is directed in its broadest terms to an apparatus and method for displaying electrical activity generated within a living body.
In accordance with the present invention, measurements taken externally of the body by non-invasive techniques permit the determination and display of electrical activity from within the body.
The electrical activity is depicted in the form of one or more dipoles or other electrical phenomena properly positioned and oriented within an image of the body.
While the invention will be principally described through embodiments in which dipoles are the depicted form of electrical activity, it is intended that the invention embraces other embodiments in which other electrical phenomena are depicted, such as arrays or matrices of positive and negative charges.
Thus, the invention embraces various visual representations which quantify, qualify and locate electrical activity within a living body.
The apparatus of the present invention is automated so that the mathematical computation of the dipole may be accomplished in a relatively short time period using well known algorithms developed for this purpose.
Moreover, the apparatus permits the operator to view the dipole within the body from different perspectives, or as a series of dipole displays over time, or even as a tracing or composite of a plurality of dipoles over a given time period.
Still further, the apparatus permits the dynamic, interactive input of the operator to employ preselected dipole criteria to facilitate computation of the dipole and its analysis upon display.
The apparatus of the present invention also provides additional techniques not previously available for generating topographic maps of brain electrical activity wherein such maps are derived in whole or in part from previously computed dipoles.
Moreover, the apparatus may be used to produce topographic maps resulting from the input of a given or hypothetical dipole (or dipoles).
In this manner, the operator may input the necessary parameters for a given dipole and observe the resulting topographic map

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