Dear Matthew,
I'm really interested in your coordinate tranform, but your server does not
allow me to access. I get the message:
Error: Sorry but you are not authorised to access /Imaging/mnispace.html.
Access to this document is forbidden from your client.
What can we do for that?
Tugan Muftuler
At 6:39 PM +0100 10/18/1999, Matthew Brett wrote:
>Dear Fellow SPMers,
>
>One of our researchers here was recently asking how to determine estimated
>Brodmann's areas using the coordinates from his SPM analysis. This
>prompted me to look again at the thorny issue of the differences between
>the MNI brains (which SPM96 and SPM99 use as templates) and the brain in
>the Talairach atlas. These differences can mean that coordinates relative
>to the MNI brain, such as those given by SPM, cannot be straighforwardly
>related to the Talairach atlas; This is a topic which has been discussed
>fairly fully last year on the list.
>
>I return to the topic for two reasons. Firstly, it seems to me that many
>users of SPM appear to report that their data have been normalised to the
>brain in the Talairach atlas. I wonder whether we the SPM users
>could develop some way of pointing out to unwary readers that the coordinates
>we report from SPM analyses on data normalised to the MNI brain may not be
>directly comparable to the Talairach atlas.
>
>The second reason was that I have tried to come up with a very simple little
>transform that does some kind of a job of transforming coordinates from
>the MNI brain to those which match the Talairach atlas, and I would be
>very grateful for any feedback or comments. I have tested the transform
>against the only other one that I know of, kindly posted by Andreas
>Meyer-Lindenberg last year, and believe that it does a better job of matching
>the two brains. The new transform, and some description of the problem,
>is available on a web page:
>
>http://www.mrc-cbu.cam.ac.uk/Imaging/mnispace.html
>
>Once again, I would be very grateful for any comments,
>
>Thanks a lot,
>
>
>Matthew
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