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首页> 外文期刊>IEEE Transactions on Medical Imaging >Inversion of simulated evoked potentials to charge distribution inside the human brain using an algebraic reconstruction technique
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Inversion of simulated evoked potentials to charge distribution inside the human brain using an algebraic reconstruction technique

机译：使用代数重建技术将模拟诱发电位反转为人脑内部的电荷分布

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摘要

An analytic method is presented to estimate the evolution of electrical charge distribution inside the human brain related to the evoked potentials observed on the head surface. A three-layer concentric spherical human head model is adopted to express the relation between the observed potentials on the head surface and the spatial charge distribution inside the brain. An integral equation associated with the three-layer concentric head model Green's function is employed. Assuming the electric potentials are measured on the head surface, the charge distributions inside the human brain are computed by solving an inverse problem. The Green's function integral equation is inverted by using an algebraic reconstruction technique widely employed in X-ray tomography imaging. The accuracy of the proposed technique is examined by employing computer simulations and by checking the self-consistency of the algorithm.
机译：提出了一种分析方法来估计与在头部表面观察到的诱发电位有关的人脑内部电荷分布的演变。采用三层同心球形人体头部模型来表达在头部表面观察到的电位与大脑内部空间电荷分布之间的关系。使用与三层同心圆头模型格林函数关联的积分方程。假设在头部表面上测量了电势，则通过解决反问题来计算人脑内部的电荷分布。格林函数积分方程通过使用X射线断层扫描成像中广泛使用的代数重建技术来求逆。通过采用计算机仿真并通过检查算法的自洽性来检验所提出技术的准确性。

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