Dear SPM group,
I fully agree with the statements at the end of Didine“s mail. It may be
worth to emphasize that T&T have published their "Referentially oriented
cerebral MRI anatomy" which is based on 100 brains. 36 are shown in
sagittal, 58 in coronal and 6 in transversal cuts. In contrast to their
original atlas, we are dealing with different brains here - thus, a single
transformation such as min2tal is not applicable to them. However, the
material may guide in assuring specific locations assumed from the original
T&T or a MNI brain.
W/r to Brodmann“s "cortextektonik" (1909) it may be worth to point out that
there are some other cerebroarchitectonic maps of intrest, such as C.v.
Economo“s cytoarchitectonics of man (most extensively covered in the atlas
published together with G.N. Koskinas 1925). It also allows for a good
reference to the gyral / sulcal anatomy. However, it can not substitute for
probabilistic cytoarchitectonic maps as mentioned below. Among others, the
Duesseldorf group has embarked to establish these for some regions of the
human cortex. In any case, there is a quite unbelievable amount of work
ahead of the community to select the features of interest and to cover the
entire human brain reasonably well.
In the meantime, people may want to take use of Sergey Pakhomov“s excellent
MSU / TSU plugins for SPM.
Regards-
Andreas
****************************************************************************
******************************
Dr. Andreas J. Bartsch phone: +49 (0)931-201-0
Division of Neuroradiology,
ecr.: -5791
BJMU Wuerzburg pager:
#5325
Josef-Schneider-Str. 11 fax: +49 (0)
931-201-2685
97080 Wuerzburg email:
[log in to unmask]
Germany
[log in to unmask]
****************************************************************************
******************************
----- Original Message -----
From: "Badreddine Bencherif" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, December 24, 2001 4:26 PM
Subject: Fwd: mni2tal discussion
> >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:
> >Bcc:
> >X-Attachments:
> >
> >>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
> >>
> >>__________________________________________________
> >>Do You Yahoo!?
> >>Send your FREE holiday greetings online!
> >>http://greetings.yahoo.com
>
> --
> 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
|