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- W2011539451 abstract "In the inverse problem in electrocardiography, the information concerning the tissue is known, and the electrical phenomenon in the heart is to be estimated using the measured body surface potential. In the already-estimated solution of the inverse problem in electrocardiography, the forward solution is determined first, and then the backward solution is derived using the forward solution. In this procedure, an ill-posed problem may be generated, resulting in an unstable solution, necessitating smoothing. This paper proposes a new method of solution where the backward solution is calculated directly from the surface potential. Due to the ill-posed condition inherent in the inverse problem in electrocardiography, the potential distribution derived inside the body is oscillatory. The local spatial smoothing is applied to suppress the oscillation. The tissue information is given from Computerized Tomography through an image-input device. Then a nonlinear network is constructed. The earlier solution method for the inverse problem in electro-cardiography can only be applied to the linear electrical medium. The proposed method can also be applied to the nonlinear system. This paper describes the solution method for the inverse problem in electrocar-diography taking the nonlinear conductance into consideration. Examples solved by applying this method are shown. In this method, the deficit of information by excessive smoothing can be avoided. Especially, in the precardial part, the epicardial potential close to the true distribution can be estimated. The proposed method does not require the forward solution. The computation time can be reduced. By employing a successive solution method the memory capacity can be reduced." @default.
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- W2011539451 date "1986-01-01" @default.
- W2011539451 modified "2023-09-24" @default.
- W2011539451 title "A method for solving the inverse problem in electrocardiography using a nonlinear torso model" @default.
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- W2011539451 doi "https://doi.org/10.1002/ecjb.4420690711" @default.
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