I have computed the BEM head model in MRI volume source space and then computed source using dSPM method. However, when I tried to reconstruct/simulate the signal, there was an error for the simulation.
I want to know how the following progress can be done using brainstorm, especially the reconstructed signal from dSPM source map:
" For each patient, we constructed a forward model with boundary element method using OpenMEEG. Source space included one or both hemispheres depending on the implanted electrodes’ locations. For each propagating event, we solved the inverse problem using dynamic statistical parametric mapping (dSPM) obtaining spatiotemporal unconstrained dipole maps of time windows with 500 ms duration (from −200 to 300 ms, with 0 corresponding to the first onset spike) using Brainstorm. This duration was selected to capture the entire propagation phenomenon, based on prior findings showing a maximum duration of 250 ms. We considered the data covariance matrix to be all windows centred around each spike's onset with a 200 ms duration, and the noise covariance to be the identity matrix. To reduce the source spurious activity, we considered windows with a correlation above 0.7 between the reconstructed and original signal."
Reference:
Matarrese MAG, Loppini A, Fabbri L, Tamilia E, Perry MS, Madsen JR, Bolton J, Stone SSD, Pearl PL, Filippi S, Papadelis C. Spike propagation mapping reveals effective connectivity and predicts surgical outcome in epilepsy. Brain. 2023 Sep 1;146(9):3898-3912. doi: 10.1093/brain/awad118. PMID: 37018068; PMCID: PMC10473571.