Jenny Crinion's paper (to appear in NeuroImage) will tell you a bit more about the increased accuracy of using the SPM5 segmentation. Note that the procedure is related to the so called "optimized VBM" strategy that was used with SPM2. It was generally done for VBM studies, but the procedure would also give higher accuracy spatial normalization for fMRI.
Very soon, there will be some extra-accurate spatial normalization available for SPM5 in the form of the DARTEL toolbox (a paper about this will also appear in NeuroImage quite soon). This toolbox will be released in a future set of updates for SPM5. Some of the guys at the FIL have been using it for VBM studies, and it seems to give much cleaner results than the existing spatial normalisation. I would expect a similar improvement for fMRI studies.
Best regards,
-John
-----Original Message-----
From: SPM (Statistical Parametric Mapping) [mailto:[log in to unmask]] On Behalf Of Marko Wilke
Sent: Friday, August 10, 2007 3:16 PM
To: [log in to unmask]
Subject: Re: [SPM] SPM5/SPM2 Normalization
Hi Amir,
> I was wondering if there is any major changes/improvements in the
> normalization algorithms in SPM5 compared to SPM2? Is there any list of
> all improvments/changes in SPM5 compared to SPM2? I only found somthing
> about EEG/MEG analysis added in SPM5. Thanks in advance.
It is a little tricky insofar as the recommended road towards
normalization in spm5 now is segmentation. Check out Ashburner &
Friston, Unified segmentation, NeuroImage 2005 (I think). Also search
teh spm-archives for segmentation and spm5 and normalization and spm5
and ...
Best,
Marko
--
=====================================================================
Marko Wilke (Dr.med./M.D.)
[log in to unmask]
Universitäts-Kinderklinik University Children's Hospital
Abt. III (Neuropädiatrie) Dept. III (Pediatric neurology)
Hoppe-Seyler-Str. 1, D - 72076 Tübingen
Tel.: (+49) 07071 29-83416 Fax: (+49) 07071 29-5473
=====================================================================
|