Arrangement for measuring local bioelectric currents in biological tissue

Abstract

Abstract The electrical signals measured by EEG and/or MEG sensors are supplied to a pattern recognition step in which certain signal patterns are collected and, as so-called templates, provided with time markers and passed on to a correlation step (14) which compares the continuous measured values with the templates and calculates a correlation coefficient therefrom. A threshold value definition step (15) collects signal patterns exceeding the threshold value from the continuously measured signal and supplies the said signal patterns to a comparison step (16) which compares the correlated signal with the signal exceeding the threshold value. An averaging step (17) forms temporal mean values of the selected, temporarily and spatially similar signal patterns (S2, S3). A localising step (18) determines therefrom the geometrical location of the pathological electrically active source which has appeared. These are supplied to a monitor (21), together with a sectional representation of the same object produced by a scanner, and displayed in superimposed form. <IMAGE>

Inventors

• 👤 Klaus Dipl.-Phys. Abraham-Fuchs
• 👤 Siegfried Dr. Schneider
• 👤 Gerhard Dr. Röhrlein

Bibliographic Details