Hello everyone, i'm new on the NIRStorm plugin and Brainstorm and i have few problems that i will explain in future posts.
The first one i would like to adress is the usage of QT-NIRS in NIRStorm. When i use the process "NIRS --> Pre-process --> Detect Bad channels" to only keep channels with a SCI>75% and PSP>10%, none of my channels are removed.
However, if i use "NIRS --> Pre-process --> Scalp Coupling Index" and i take a look at "SCI" and "PSP", i can clearly see that a channel is below SCI threshold but not PSP.
But i thought that channels were removed when value of one of the parameters is not above threshold.
So, is this a bug or do i have to check for each of my participants ?
Thank you very much for the toolbox anyway !
Kind regards,
Brieuc
Currently, i am tagging as bad channels the channels that have SCI < 75% and power < 10%.
Now that you mention it, it might indeed make sense to mark as bad channel if either SCI < 75% or power < 10%. Do you know what people from QT-nirs recommend ?
A small note: i just realized you were using the option 'keep upaired channel' during the bad channel detection. We don't recomend using it as it means that for some channel you will keep only one wavelength and it might lead to issues with the MBLL.
Also, if one wavelength is not reliable, the other one is also often not trustworthy.
So i actually removed the option alltogether now. it was mainly here for test purpose.
Hello Edouard, Ok thank for the tips, i did not know what this option was for but as it was used in the NIRS tutorial, i thought that it had to be checked.
I encountered a problem following the (very) nice update with QT-NIRS !
Now i have a feedback telling me that 2 channels are actually removed (both wavelengths for the channel) but i can't open the signal anymore after that. I have the error telling me that there is a mismatch between the original file and the "new" file :