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• W2912186302 abstract "This study investigates the effects of the input parameter uncertainties (organ conductivities, boundary data, etc.) on the electrocardiography (ECG) imaging problem. These inputs are very important for the construction of the torso potential for the forward problem and for the non-invasive electrical potential on the heart surface in the case of the inverse problem. We propose a new stochastic formulation that allows us to combine both sources of errors. We formulate the forward and inverse stochastic problems by considering the input parameters as random fields and a stochastic optimal control formulation. In order to quantify multiple independent sources of uncertainties on the forward and inverse solutions, we attribute suitable probability density functions for each randomness source and apply stochastic finite elements based on generalized polynomial chaos method. The efficiency of this approach to solve the forward and inverse ECG problems and the usability to quantify the effect of organ conductivity and epicardial boundary data uncertainties in the torso are demonstrated by a number of numerical simulations on a two-dimensional computational mesh of a realistic torso geometry." @default.
• W2912186302 created "2019-02-21" @default.
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• W2912186302 date "2019-01-01" @default.
• W2912186302 modified "2023-10-17" @default.
• W2912186302 title "Propagation of two independent sources of uncertainty in the electrocardiography imaging inverse solution" @default.
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• W2912186302 doi "https://doi.org/10.1051/mmnp/2018065" @default.
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