Re: [Freesurfer] Deconvolution with FSFAST {Disarmed}

2019-08-12 Thread Caspar M. Schwiedrzik
External Email - Use Caution Hi Doug, I am referring to deconvolution in the SPM sense, where they use (something like) ridge regression to get an estimate of neuronal activity from the measured BOLD response. The idea is to use that neural time series to construct predictors for a

Re: [Freesurfer] Deconvolution with FSFAST

2019-08-12 Thread Greve, Douglas N.,Ph.D.
When you say deconvolution, what do you mean exactly? There is an FIR model (finite impulse response) that will extract the hemodynamic response without any assumptions, ie, the signal average at stimulus onset, the signal average at 1TR post onset, the signal average at 2TR post onset, etc. On

[Freesurfer] Deconvolution with FSFAST

2019-08-09 Thread Caspar M. Schwiedrzik
External Email - Use Caution Hi! I was wondering whether it is possible to do deconvolution of an fMRI time series with FSFAST? Specifically, I would like to get a deconvolved signal from a region of interest to prepare predictors for a PPI analysis. Additional considerations: data