Updated 12 Mar 2019
Zeffiro Interface Forward and Inverse Interface for Electromagnetic Brain Imaging is an open source code package constituting a simple tool for finite element (FE) based forward and inverse simulations in EEG/MEG and other brain imaging applications, for example, Electrical Impedance Tomography (EIT). With Zeffiro, one can segment a realistic multilayer geometry and generate a finite element mesh, if triangular surface grids (in ASCII DAT file format) are available.
The name Zeffiro is Italian for 'a gentle breeze'. A graphics card can be applied to speed up the computations. See: "He, Q., Rezaei, A., & Pursiainen, S. (2018). Zeffiro user interface for electromagnetic brain imaging: a GPU accelerated FEM tool for forward and inverse computations in Matlab. arXiv:1811.07717." https://arxiv.org/pdf/1811.07717.pdf
The name Zeffiro is Italian for 'a gentle breeze'. A graphics card can be applied to speed up the computations. As a special feature one can generate a time-lapse of inverse estimates for a given data sequence, see:
The essential mathematical techniques have been reviewed and validated in: "Miinalainen, T., Rezaei, A., Us, D., Nüßing, A., Engwer, C., Wolters, C. H., & Pursiainen, S. (2019). A realistic, accurate and fast source modeling approach for the EEG forward problem. NeuroImage, 184, 56-67." and "Pursiainen, S. (2012). Raviart–Thomas-type sources adapted to applied EEG and MEG: implementation and results. Inverse Problems, 28(6), 065013." The source model has been introduced in "Pursiainen, S., Vorwerk, J., & Wolters, C. H. (2016). Electroencephalography (EEG) forward modeling via H (div) finite element sources with focal interpolation. Physics in Medicine & Biology, 61(24), 8502." and the inversion method in "Calvetti, D., Hakula, H., Pursiainen, S., & Somersalo, E. (2009). Conditionally Gaussian hypermodels for cerebral source localization. SIAM Journal on Imaging Sciences, 2(3), 879-909.". A more detailed introduction to the essential features and the scientific methodology of the interface can be found in:
If you are interested to develop the package, please contact email@example.com.
Sampsa Pursiainen (2019). Zeffiro Forward and Inverse Interface for Brain Imaging (https://www.github.com/sampsapursiainen/zeffiro_interface), GitHub. Retrieved .
18-compartments, options to merge and invert meshes, when importing.
Missing plugin file added.
Flash-free time-lapses for r2018b and above.
Plugin utility added.
New main window configuration.
Description and 3D plots.
Corrected plot mesh routine.
EIT and multiresolution solvers
Gradiometer solver for MEG + EIT solver
Complete Electrode Model
More inverse tools.
Inverse tools update.
New inverse tools added.
Create scripts with code, output, and formatted text in a single executable document.