[Homer-users] channel pruning & image reconstruction

[David Boas]

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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