SIGNAL PROCESSING METHOD FOR ESTIMATING IN-VIVO CURRENT DISTRIBUTION FROM BIOSURFACE POTENTIAL DISTRIBUTION

摘要

PURPOSE: To allow the estimation of the positions and sizes of the current dipoles to generate a biosurface potential distribution by dividing a living body to fine cells, connecting the admittances calculated from the dielectric constants of the respective cells, substituting the fine cells with a three-dimensional space circuit network and numerically solving the voltages at the nodes of the three- dimensional space circuit network. ;CONSTITUTION: The three-dimensional magnetic resonance image of x-ray image of a testee body 1-1 is divided to n-pieces of the cells and the testee body 1-1 is substd. with the three-dimensional cubic grid network. The admittances connected to the respective one-dimensional lines are determined by using the dielectric constants of the biotissue in the respective cells. The current dipoles in the testee body 1-1 are then assumed and the positions thereof and the initial values of the current vectors are set. Prescribed equations are established from Kirchhoff's first law, i.e., nodal rule. These equations are set up with all the nodes and the solutions to satisfy n-pieces of the simultaneous equations are obtd.;COPYRIGHT: (C)1993,JPO&Japio