Hi Arshad, I've put a gzipped tar file containing 3 different average subjects named average5, average6 and average7. They are each super-sampled icosahedra, with increasing numbers of vertices (10,000, 40,000 and 160,000). The coordinates of the vertices should be approximately a "talairach average" for that cortical location, although I wouldn't rely on that too much. In general the averages are only meant for displaying group data, not for any statement about what the true average geometry of the cortex is. The file is in:
ftp surfer.nmr.mgh.harvard.edu:/space/outgoing/fsdev/average.tar.gz cheers, Bruce On Thu, 20 Dec 2001, A Zaman wrote: > > Hi Bruce, > > The SPM T1 is an average (152, MNI). > > I (for one!, plus a good number of my national colleges) would very > much like to have an average inflated/pial brain. Any chances of > of putting the respective datasets on your ftp site? > > Many thanks, > > Arshad > > *********************************************************/ > > Dr. Arshad Zaman > Magnetic Resonance & Image Analysis Research Centre > University of Liverpool > Liverpool > L69 3BX > > Tel + 44 (0) 151 794 5645 > Fax + 44 (0) 151 794 5635 > [EMAIL PROTECTED] > > > *********************************************************/ > > > On Thu, 20 Dec 2001, Bruce Fischl wrote: > > >Hi Arshad, > > > >I haven't seen it. Is it an average? If so, then it will never work. If > >it's an individual then it might if it has high enough contrast-to-noise. > >We also have average inflated/white/pial brains that we use, which we could > >make available to people if there is enough interest. > > > >Bruce > > > > > > On Thu, 20 Dec 2001, A Zaman wrote: > > > >> > >> Dear Bruce (and all), > >> > >> Is there anyway to inflate the SPM T1 (template) brain? > >> > >> Best wishes, > >> > >> Arshad > >> > >> *********************************************************/ > >> > >> Dr. Arshad Zaman > >> Magnetic Resonance & Image Analysis Research Centre > >> University of Liverpool > >> Liverpool > >> L69 3BX > >> > >> Tel + 44 (0) 151 794 5645 > >> Fax + 44 (0) 151 794 5635 > >> [EMAIL PROTECTED] > >> > >> > >> *********************************************************/ > >> > >> > >> On Tue, 11 Dec 2001, Bruce Fischl wrote: > >> > >> >Hi Arshad, > >> > > >> >not really, but you can create an average curvature map and paint it onto > >> >an individual brain so that it shows what the average folding pattern of a > >> >group of subjects is. See the binary mris_average_curvature. For example: > >> > > >> >mris_average_curvature curv lh sphere.reg <subject 1> <subject 2> ... <subject >n> avg_curv > >> > > >> >will generate an average of the n curvature maps and write it into the file > >> >lh.avg_curv in subject n's surf directory. > >> > > >> >cheers, > >> >Bruce > >> > > >> > > >> > > >> > > >> >On Tue, 11 Dec 2001, A Zaman wrote: > >> > > >> >> > >> >> Dear Bruce, > >> >> > >> >> I was wondering is it possible to construct > >> >> an 'average' inflated brain for a number of subjects. > >> >> > >> >> Many thanks, > >> >> > >> >> Arshad > >> >> > >> >> *********************************************************/ > >> >> > >> >> Dr. Arshad Zaman > >> >> Magnetic Resonance & Image Analysis Research Centre > >> >> University of Liverpool > >> >> Liverpool > >> >> L69 3BX > >> >> > >> >> Tel + 44 (0) 151 794 5645 > >> >> Fax + 44 (0) 151 794 5635 > >> >> [EMAIL PROTECTED] > >> >> > >> >> > >> >> *********************************************************/ > >> >> > >> >> > >> > > >> > > >> > > > > >
