Dipole location using SQUID based measurements: Application to magnetocardiography

作者：Mariyappa N^*; Parasakthi C; Sengottuvel S; Gireesan K; Patel Rajesh; Janawadkar M P; Sundar C S; Radhakrishnan T S

来源：Physica C-Superconductivity and Its Applications, 2012, 477: 15-19.

DOI：10.1016/j.physc.2012.02.044

• Magnetocardiography
• Equivalent current dipole
• Nonlinear least square
• Inverse problem

We report a method of inferring the dipole location using iterative nonlinear least square optimization based on Levenberg-Marquardt algorithm, wherein, we use different sets of pseudo-random numbers as initial parameter values. The method has been applied to (i) the simulated data representing the calculated magnetic field distribution produced by a point dipole placed at a known position, (ii) the experimental data from SQUID based measurements of the magnetic field distribution produced by a source coil carrying current, and (iii) the actual experimentally measured magnetocardiograms of human subjects using a SQUID based system.

• 出版日期2012-7