Rd. Throne et Lg. Olson, THE EFFECTS OF ERRORS IN ASSUMED CONDUCTIVITIES AND GEOMETRY ON NUMERICAL-SOLUTIONS TO THE INVERSE PROBLEM OF ELECTROCARDIOGRAPHY, IEEE transactions on biomedical engineering, 42(12), 1995, pp. 1192-1200
In this paper we used a previously proposed model problem to examine t
he effects of inhomogeneities on four techniques for numerically solvi
ng the inverse problem of electrocardiography, The layered inhomogeneo
us eccentric spheres system contains three regions representing the lu
ngs, muscle, and subcutaneous fat, and is numerically modeled using fi
nite elements, We simulated both anterior and posterior spherical cap
activation fronts, We examined inverse solutions based on zero order T
ikhonov regularization, truncated singular value decomposition, our ne
w generalized eigensystem approach, and a modification of the generali
zed eigensystem approach, The effects on the inverse solutions of geom
etrical errors, errors in the assumed conductivities, and homogeneous
torso assumptions were examined.