[Homer-users] Probabilistic Spatial Resgistration

[Drew Halliday]

Hi Simone -- Thanks for your reply.  These applets are great!  I think
they're exactly what I was looking for.

Cheers,
Drew

On Mon, Feb 4, 2013 at 3:56 PM, Simone Cutini <simone.cutini at unipd.it>wrote:

>  Hi Drew,
> you might also check the Münster T2T-Converter:
> http://wwwneuro03.uni-muenster.de/ger/t2tconv/
> Basically, it allows to obtain the MNI coordinates from 10-20 measurements
> (and viceversa).
> This is the link to the 3D app:
> http://wwwneuro03.uni-muenster.de/ger/t2tconv/conv3d.html
> Note that the results are slightly different from those observed in other
> studies on cranio-cerebral correlation.
>
> Simone
>
>
>  Hi Austin,
>
>  Thanks for your reply.  I had indeed seen those slides from Ippeida Dan,
> but had glazed over the MNI table -- Thanks!  I guess it would be fairly
> straight forward to put together a spreadsheet that computes 10-20 based on
> distance measurements.
>
>  Cheers,
> Drew
>
> On Mon, Feb 4, 2013 at 11:57 AM, austin1 <astoudenmire at earthlink.net>wrote:
>
>>  Drew
>>
>>
>>
>> Dunno if you've seen this site:
>>
>> http://www.jichi.ac.jp/brainlab/download/fNIRS_Course_Dan.pdf
>>
>> but it might help some.
>>
>> Also, to compute 10-20 sites from distances (nasion-inion, etc.), it
>> would just be a matter of percents from one to the other.
>>
>> Then the reference above gives a chart on one of the slides that shows
>> 10-20 to MNI conversion.
>>
>> Is this something on the order of what you're looking for?
>>
>>
>>
>> Austin
>>
>>
>>  -----Original Message-----
>> From: Drew Halliday
>> Sent: Feb 1, 2013 5:07 PM
>> To: homer-users at nmr.mgh.harvard.edu
>> Subject: [Homer-users] Probabilistic Spatial Resgistration
>>
>> Hello NIRS community,
>>
>>
>>
>> Has anyone successfully used gross anatomical landmarks (e.g., nasion,
>> inion, left and right preauriculars) to computer probabilistic spatial
>> registration using either Homer 2, or another program (e.g., fNRI Tools
>> from Ippedia Dan’s group)? My understanding is that this can be done
>> without MRI or 3D Digitizer data, however the disconnect for me is in
>> computing 10-20 or MNI coordinates based simply on distances from
>> nasion-inion, left-right preauriculars, and other combinations of distances
>> between these landmarks.
>>
>>
>>
>> As the AltasViewer GUI in Homer 2 is not yet available, I have been using
>> fNRI Tools, and to a lesser extent NIRS_SPM.  An ‘origin’ and ‘others’
>> spreadsheet (.csv) are called during this process, however these
>> spreadsheets contain x, y and z axis coordinates, presumably computed using
>> either 3D digitizer data, MRI scans, or gross anatomical measurements.
>>
>>
>>
>> Does anyone know how to use a probe geometry file, combined with gross
>> anatomical measurements, and produce said origin and others spreadsheets?
>> All thoughts are welcomed!
>>
>>
>>
>> Thanks,
>>
>> Drew
>>
>>
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>
>
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>
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>
> --
>
> Simone Cutini, PhD, Post-doctoral Research Fellow
> Department of General Psychology, University of Padova
> Via Venezia 8, 35131, Padova, Italy
> Tel: +39.049.8276528
> Fax: +39.049.8276600
> My Profile on Mendeley <http://www.mendeley.com/profiles/simone-cutini/>
>
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