How do you recommend to EIT carrier frequency through low pass filtering

[rkalahasty]

I am trying to extract EEG from the whole bdf using the low pass filtering that was recommended in the paper. How do you recommend we do this

[Jimbles]

Hey. I think the easiest way to do this is to use the "Time difference" datasets, the ones with the -TD# suffix. The lowest EIT frequency injected is 200 Hz so it should be out of band of any EEG activity. You can use the code in Extract_EEG.m as inspiration. You will likely get some artefacts from the EIT injection switches, so you may wish to mask these data points or remove them prior to filtering. Using the Extract_EEG as an example, the switching points can be found at Trigger.RisingEdges{1, 1} or TT.InjectionSwitches

[rkalahasty]

Thank you!

On Fri, Dec 17, 2021 at 9:08 AM James Avery @.***> wrote:

Hey. I think the easiest way to do this is to use the "Time difference" datasets, the ones with the -TD# suffix. The lowest EIT frequency injected is 200 Hz so it should be out of band of any EEG activity. You can use the code in Extract_EEG.m as inspiration. You will likely get some artefacts from the EIT injection switches, so you may wish to mask these data points or remove them prior to filtering. Using the Extract_EEG as an example, the switching points can be found at Trigger.RisingEdges{1, 1} or TT.InjectionSwitches

— Reply to this email directly, view it on GitHub https://github.com/EIT-team/Stroke_EIT_Dataset/issues/10#issuecomment-996749672, or unsubscribe https://github.com/notifications/unsubscribe-auth/AVCMCXQEEC2NHT3SKXRWKWDURM74HANCNFSM5JT2M5FA . You are receiving this because you authored the thread.Message ID: @.***>