[Homer-users] channel pruning & image reconstruction

[Emanuele Perugia]

Thanks for the replay..

Well, the image reconstruction gives me the first overview of the  
data.. and I think it should be nice have it (or its improved version)  
on Homer2.

Regarding the pruned channel, perhaps I have not been clear enough:  
once I manually or automatically (thanks for the tip!) pruned a  
channel, I would like to do not have that channel on the data  
windows.. I don’t know if it is a kind a my bug because Homer1 does it  
properly..

Best,
Emanuele


Quoting David Boas <dboas at nmr.mgh.harvard.edu>:

> Thanks for bringing up the question of image reconstruction. I didn't
> realize that people used that feature in Homer1. We've been working on
> reconstructing images on an atlas head model similar to what we have in
>
> Cooper, R.J., Caffini, M., Dubb, J., Fang, Q., Custo, A., Tsuzuki, D.,
> Fischl, B., Wells, W., 3rd, Dan, I. and Boas, D.A. (2012). "Validating
> atlas-guided DOT: A comparison of diffuse optical tomography informed by
> atlas and subject-specific anatomies." Neuroimage 62(3): 1999-2006.
>
> This should be available in the next few months.
>
> Homer1 just reconstructed images assuming a semi-infinite medium. I am
> curious if many people want this capability from Homer1 added into
> Homer2. Please let me know. Best to use this email list for group
> discussion on it. Thanks.
>
>
> For your first question, I think you are asking for confirmation that a
> manually pruned channel (i.e. dashed with pink highlight in the SD
> window) is not considered in subsequent processing functions. Is this
> correct? Note that there is a Prune Channels function that will
> automatically prune channels based on signal level or SNR. An
> automatically pruned channel will have a yellow highlight in the SD window.
>
> David
>
>
>
>
> On 11/8/12 3:28 PM, Emanuele Perugia wrote:
>> Hi!
>>
>> I have two issues regarding Homer2:
>>
>> 1) when I deselect or prune a channel then it will become dashed and
>> pink on the probe windows but it will still plot on the data windows
>> and maybe be accounted on the signal processing (interesting is that
>> the deleted channels are not ploted on the HRF in the probe space):
>> how can resolve this?
>>
>> 2) Homer1 has the really useful image reconstruction option: does
>> homer2 have it? in case, where?
>>
>> Thanks in advance..
>> best,
>>
>> Emanuele
>>
>> --
>> Emanuele Perugia
>> PhD Student in Neuroscience
>> Faculty of Medicine
>> Université de Picardie Jules Verne
>> Amiens, France
>> http://www.u-picardie.fr/labo/GRAMFC
>>
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>>
>
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-- 
Emanuele Perugia
PhD Student in Neuroscience
Faculty of Medicine
Université de Picardie Jules Verne
Amiens, France
http://www.u-picardie.fr/labo/GRAMFC