A novel cardiac equivalent moving dipole solution

We propose a novel approach for localizing a cardiac equivalent moving dipole, by which only the maximum and the minimum values measured at two magnetic field measurement sites are employed in solving the inverse problem. The numerical experiments verify that the operation speed of this approach is faster than that of the previous equivalent moving dipole solution, which applies an iterative algorithm and 36-channel measurements by a superconducting quantum interference device (SQUID) system. Its localization error depends on the interval of two sites on a measuring plane. We also show the results of two sets of magnetocardiography (MCG) data, which illustrate the feasibility of this approach for localizing a cardiac equivalent current source in ST-T segment without using a realistic torso model. Moreover, the magnetic field produced by Ohmic current is discussed.