[Homer-users] Calculating Channel Length in Homer2

[Meryem Ayse Yucel]

Hi Katherine,

If you add prune channels option to your processing stream, there is a
SDrange option which limits the channels to certain source detector
distance.

On the other hand, having no short separation is not a problem anyway. GLM
has options to allow solving without short separation regression, so you
don't need to prune your channels.

Hope this helps.

Meryem

> Hello,
>
> I've been working with HOMER2 for a bit and was wondering if there were a
> way to limit the data I include in my analysis to only channels greater
> than 45mm? Our data does not include any short distance channels.
>
> I looked through the processing stream options, as well as, the options in
> SDgui and the SrcPos and DetPos in the SD structure, but couldn't find
> anything that clearly told me the channel lengths. Maybe I've overlooked
> something?
>
> Not sure if this is necessary, but I'm working with the Homer2_UI.exe, in
> Matlab 2013b, on a Mac OS X Yosemite 10.10.2. The data were acquired and
> converted to the .nirs format from an in-house constructed NIRS system.
>
> Kind Regards,
>
> --
> *Katherine M. Becker*
> Graduate Student
> Developmental Neuroimaging Lab
> Department of Psychology
> Colorado State University
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