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Registration Number

0207U005561, 0106U002886 , R & D reports

Title

Solution of magnetostatic inverse problems for magnetocardiography measurement processing

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Head

Shylga S, Кандидат фізико-математичних наук

Registration Date

14-05-2007

Organization

Kharkov National University named after V.N.Karazin

Description

The object of investigation is magnetic field source of a human heart in the form of a point magnetic dipole. The aim of investigation is to develop algorithms for solving the inverse problem of magnetostatic intended to interpretation of measured magnetic fields of heart in magnetocardiography. It is necessary to define a current distribution in the patient's heart based from the measured magnetic fields. The suggested approach uses a simple magnetic dipole model for description of the heart electrical activity. The main problem is using available measured normal components of magnetic field on a discrete plane aperture to define spatial location and transverse components of equivalent magnetic dipole which would induce field maximally close to the measured one. The method of investigation is based on using eigenvector projection method, which was implemented as bundled software suitable for processing of real measurement results. As a result of investigation several basic problems were solved: 1. Thenumerical-analytical solution of the direct problem in magnetocardiography for magnetic field reconstruction by assigned magnetic dipole was realized. 2. A new fast and exact solution technique for the inverse problem of magnetocardiology aimed to localization of magnetic field source of a human heart based on fast Fourier transform and eigenvalues and eigenvectors methods was designed. 3. The accuracy comparison of suggested and theoretical methods was carried out. 4. The analysis and systematization of experimental results for reconstruction of parameters localization of the field source in the form of inductance coil was executed. 5. The developed algorithm and corresponding C++ software are applied in a number of medical clinics of USA. INVERSE PROBLEM IN MAGNETOCARDIOLOGY, MAGNETIC DIPOLE, WEAK MAGNETIC FIELD, EIGENVECTORS METHOD, FAST FOURIER TRANSFORM. The report accessibility: by agreement, 61077, Kharkov-77, Svobody Sq., 4, V.N. Karazin Kharkov National University.

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