>Date: Mon, 24 Dec 2001 11:26:22 -0400
>To: "Sun, Chen-Ming" <[log in to unmask]>
>From: Badreddine Bencherif <bench@[162.129.121.62]>
>Subject: mni2tal discussion
>Cc:
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>>Dear SPM Community,
>> I am confused about mni and tal coordinate,
>>for example if I got a [-2,-14,40] in the SPM
>>result, does it mean that this coordinate is in
>>mni space and I can use the mri2tal.m (by the
>>respectalble Matthew Brett 10/8/99) and get
>>[-2,-12,37] which is in Tal spce. or vice versa?
>
>yes. although error is greater below the AC-PC line than above if I
>remember well.
>
>I t is interesting to know that this atlas should be called
>Talairach and Tournoux (both french Neurosurgeons ) or T&T for
>brevity instead of Talairach only ( your name first in a publication
>then you deserve all credit).
>In addition the T&T atlas has been done in vitro using only one
>female brain which has been preserved in a jar containing 'formol '
>and was consequently deformed.
>The MNI atlas is based on average brain obtained in vivo using MRI
>(I think 152 brains with mean age around 40), although I do not
>recall all demographic characteristics so It should be far more
>accurate anatomically than the T&T..
>The interesting feature of T&T are the Broodman's area that can be
>reported (still based on one deformed brain).
>
>A good knowledge of neuroanatomy could probably help label
>Broodman's area relatively well when considering the original
>Broodman's work for subdivision of the brain (I suppose, look at the
>labellling of the cortical areas and anatomical landmarks) and using
>brains in MNI space and rendering on results on the cortical
>surface and the midsagittal view).
>There may be a group (on Germany?) who is working on Broodmans areas
>in a probabilistic manner (I think based on a large number of
>brains, spatial normalisatiion) but I do not know when the results
>will be available.
>
>I may have given you some partial (but hopefully not incorrect)
>informations and I welcome further comments on this subject which
>relates more broadly to the standardization of analysis and
>reporting of data for a better exchange of information between
>research groups.
>The interesting question is should we report Broodman's area or not.
>We may instead report only the MNI coordinates AND the processing
>steps (in detail) used for spatial normalization until a "gold
>standard' for spatial normalization will come.
>Didine
>
>
>
>
>>Thank you for an answer,
>> Sun, Chen-Ming 2001/12/24
>>
>>
>>=====
>>sunchenming
>>
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--
Badreddine Bencherif,MD
Department of Radiology
Division of Nuclear Medicine
Johns Hopkins University School of Medicine
601 North Caroline Street / JHOC 4230
Baltimore, MD 21287-0855 USA
Voice: (410) 614-2787 Pager: (410) 283-2050
Fax: (410) 614-1977
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