9 December 1997 Improved Wiener reconstruction of bioelectric current distribution based on its estimated correlation matrix
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Abstract
This paper proposes a new Wiener estimation method for reconstructing current distribution from biomagnetic measurement. The present method is an improved version of the method proposed by Sekihara et al., which is based on estimating the source-current correlation matrix from the measured-data correlation matrix. In our method, the regularization term used in pseudo inversion of the lead field matrix is modified so as to reduce the artifact due to noise more efficiently. The parameters in the modified regularization term are determined, not empirically, but optimally based on the measured data. Computer simulation demonstrates the effectiveness of the proposed method.
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Hideaki Haneishi, Hideaki Haneishi, Hajime Nobuhara, Hajime Nobuhara, Norimichi Tsumura, Norimichi Tsumura, Yoichi Miyake, Yoichi Miyake, } "Improved Wiener reconstruction of bioelectric current distribution based on its estimated correlation matrix", Proc. SPIE 3171, Computational, Experimental, and Numerical Methods for Solving Ill-Posed Inverse Imaging Problems: Medical and Nonmedical Applications, (9 December 1997); doi: 10.1117/12.284716; https://doi.org/10.1117/12.284716
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