Noninvasive cardiac source imaging from potential and magnetic field data

• Paul Wach ^[1] ; Gerald Fischer ^[1] ; Bernhard Tilg ^[1] ; Robert Modre ^[1]
  1. [1] Institute of Biomedical Engineering, Technical University Graz, Austria
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 18, Nº 3, 1999, págs. 236-249
• Idioma: inglés
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• Resumen

  • Ventricular surface activation time maps are estimated from simulated and measured body surface potential (BSP) maps and extra-corporal magnetic field maps. In a first step the transfer matrix, relating the primary cardiac sources to the measured potential and/ or magnetic field data, is calculated applying the boundary element method. Activation times are determined by minimizing a cost function which is based on this transfer matrix. This optimization method is solved by a quasi Newton method. The critical point theorem is used in order to estimate the starting column matrix.