Improved method for computation of potentials in a realistic head shape model.
Improved method for computation of potentials in a realistic head shape model.
复制标题
现实头部形状模型中电势计算的改进方法。
DOI：
10.1109/10.469376
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Fein,G
中科院分区：
文献类型：
--
作者：
Fletcher,DJ;Amir,A;Jewett,DL;Fein,G
基于边界元法和互易定理，提出了一种新的计算头部导体模型表面电势的方法-铅场分析（LFA）算法。与标准边界元法相比，新算法提高了计算效率，降低了存储要求。对于给定节点数的头型边界元模型，在偶极子源位置变化的情况下，该方法也能得到更精确的表面势结果。此外，该算法的结果在准解析表达式的衍生物的表面电位相对于源的位置，允许使用具有更好的收敛性能的优化技术。还描述了一组模拟，展示了在面对不同的偶极子源参数的LFA算法的鲁棒性增加。< >
The lead field analysis (LFA) algorithm, a new computational technique for the calculation of potentials on the surface of a realistic head shaped volume conductor model based on the boundary element method and the reciprocity theorem, is presented. The new algorithm, in comparison to the standard boundary element method, offers improved computational efficiency and lower storage requirements. It also yields more accurate surface potential results in the face of varying dipole source locations for a head shape boundary element model with a given number of nodes. Additionally, the algorithm results in quasi-analytic expressions of the derivatives of the surface potential with respect to the location of the sources, allowing the use of optimization techniques with better convergence properties. A set of simulations demonstrating the increased robustness of the LFA algorithm in the face of varying dipole source parameters is also described.< >