... | ... | @@ -47,7 +47,7 @@ values that do not contribute to the far-field (blind sources) are avoided, a ty |
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Scaling factor such that $`(x_i - x_0)/ref < 1`$ for all monopole locations $`x_{i}`$, e.g. 20 mm
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- **'mixedMoments' : bool**
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Determines if non-diagonal multi-indices are used for second-order moments (recommended), see (see [Dissertation A. Nüßing](http://nbn-resolving.de/urn:nbn:de:hbz:6-67139436770))
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Determines if non-diagonal multi-indices are used for second-order moments (recommended), see [Dissertation A. Nüßing](http://nbn-resolving.de/urn:nbn:de:hbz:6-67139436770)
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# Whitney
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... | ... | @@ -59,14 +59,22 @@ For a detailed description, please see: |
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Miinalainen, T, Rezaei, A, Us, D, Nüßing, A, Engwer, C, Wolters, CH & Pursiainen, S 2019, 'A realistic, accurate and fast source modeling approach for the EEG forward problem', NeuroImage, vol. 184, no. 1, pp. 56-67. [https://doi.org/10.1016/j.neuroimage.2018.08.054](https://doi.org/10.1016/j.neuroimage.2018.08.054)
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- **'interpolation' : {'PBO', 'MPO'}**
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Interpolation methods: Position Based Optimization or Mean Position/Orientation Method
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- **'n_ele' : int**
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Number of elements considered for choice of basis functions (1 to 5)
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- **'faceSources' : {'all', 'none'}**
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Indicates if face-intersecting basis functions are taken into account
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- **'edgeSources' : {'all', 'internal', 'none'}**
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Edge-wise basis functions considered, 'internal' indicate that only those in the element of the dipole are taken into account
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- **'referenceLength' : double**
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For the MPO method, the reference length $`\alpha`$ should be at least twice as large as the longest edge in the FE-mesh, e.g., 10 mm
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- **'restricted' : bool**
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If true, only vertices are considered which lie in the same conductivity compartement as the source
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# Subtraction
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The subtraction approach relies on the assumption that there exists a small area around the dipole location, where the conductivity is constant. As a result, the potential and the conductivity can be split into two contributions, a singularity contribution and a correction part: $`u = u_\infty + u_{corr}`$, and $`\sigma = \sigma_\infty + \sigma_{corr}`$.
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... | ... | @@ -79,5 +87,6 @@ Drechsler F, Wolters CH, Dierkes T, Si H, Grasedyck L. A full subtraction approa |
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Wolters, CH, Köstler, H, Möller, C, Härdtlein, J, Grasedyck, L and Hackbusch, W. 2007. Numerical Mathematics of the Subtraction Method for the Modeling of a Current Dipole in EEG Source Reconstruction Using Finite Element Head Models. SIAM J. Sci. Comput. 30, 1 (November 2007), 24–45. [https://doi.org/10.1137/060659053](https://doi.org/10.1137/060659053).
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- **'intorderadd' : int**
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Integration order of volume integral
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- **'intorderadd_lb' : int**
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Integration order of boundary integral |