[Homer-users] Homer-users Digest, Vol 67, Issue 3

[Harleen Chhabra]

Thank you David. I will try the Prune channel help and will get back if i
face any further problem.

Harleen Chhabra,
PhD scholar,
Department of Psychiatry,
National Institute of Mental Health and Neurosciences (NIMHANS),
 India.



On Wed, Jun 10, 2015 at 9:30 PM, <homer-users-request at nmr.mgh.harvard.edu>
wrote:

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>    1. Re: Spatial smoothing in Homer2 and issues related to     prune
>       channel function (David Boas)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 9 Jun 2015 14:58:45 -0400
> From: David Boas <dboas at nmr.mgh.harvard.edu>
> Subject: Re: [Homer-users] Spatial smoothing in Homer2 and issues
>         related to      prune channel function
> To: homer-users at nmr.mgh.harvard.edu
> Message-ID: <1C5A2D32-73F5-4354-BB4F-B0104D027A42 at nmr.mgh.harvard.edu>
> Content-Type: text/plain; charset="us-ascii"
>
> 1) We have no spatial smoothing in the Homer functions. This is something
> good to think about once we have Homer and AtlasViewer integrated.
>
> 2) You need to set the prune channels options to match your data values.
> It sounds like you are reporting good SNR metrics based on guidance you
> were provided for the NIRX. Read the help information for the prune
> channels command and adjust to match your metrics.
>
> I hope that helps.
>
> David
>
>
>
>
> > On Jun 9, 2015, at 3:01 AM, Harleen Chhabra <harleenchhbr1 at gmail.com>
> wrote:
> >
> > Hi all,
> >
> > I am using CW NIRX Scout for my fNIRS data acquisition and i am trying
> to analyse my data with Homer2. I am still getting familiarized with the
> software and so have two very basic questions:
> >
> > 1. Does Homer2 allows for spatial smoothing of the data? If yes, then if
> anyone can help me figure out the function in the processing stream?
> >
> > 2. When i try using the "prune channel" function with default values,
> all the channels are excluded from analysis. During data acquisition it is
> made sure that the gain is below 8 and the CV is below 15% for all the
> channels. Also the channels are checked for SNR before starting the
> acquisition. I am not sure as to where i am going wrong. If anyone can help
> me figure this out.
> > Thank you.
> >
> > Harleen Chhabra,
> > PhD scholar,
> > Department of Psychiatry,
> > National Institute of Mental Health and Neurosciences (NIMHANS),
> > India.
> > _______________________________________________
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-- 
Sincerely,
Harleen Chhabra
PhD Scholar & Junior Research Fellow
Neurobiology Research Center (NBRC)
National Institute of Mental Health And Neurosciences
Bangalore- 560 029

Affiliation: Department of Psychiatry, NIMHANS
Translational Psychiatry Lab: www.transpsychlab.org
InStar: www.instar-program.org
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