Print

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I encourage you to look through the SPM manual

http://www.fil.ion.ucl.ac.uk/spm/doc/manual.pdf

John Ashburner's review article: Ashburner J, Friston KJ (2000) Voxel-based
morphometry - The Methods. Neuroimage 11:805-821.

and the SPM code
spm_write_sn.m
spm_smooth.m

for more information about he actual algorithms implemented in spm for
normalization  and smoothing.

darren



> -----Original Message-----
> From: SPM (Statistical Parametric Mapping) 
> [mailto:[log in to unmask]] On Behalf Of Linda Seltzer
> Sent: Wednesday, April 30, 2008 8:53 AM
> To: [log in to unmask]
> Subject: Re: [SPM] Ask the algoritm of modulation in VBM
> 
> I do not have the book here with me, but I think that 
> Mathematical Methods for Physicists by Arfken provides the 
> derivations you are looking for.  The older editions of the 
> book are fine.
> 
> Linda Seltzer
> UC Davis
> 
> > Hi,professor.
> >    I am a newer. Now I am studying the optional step in VBM- 
> > modulate.I know the aim isto preserve the volume .And the 
> modulation 
> > equal to the voxel value multiply the Jacobian 
> determinants.I want to 
> > ask the
> Jacobian
> > determinants is contain the information of rotation or 
> not.And I don't
> know
> > the process of derive of Jacobian determinants .Can you tell me the 
> > algorithm of modulation.
> >    Thanks.
> > 
> >        
> > ---------------------------------
> >  ÑÅ»¢ÓÊÏ䣬ÄúµÄÖÕÉúÓÊÏ䣡
>