Hi Arshad, the average7 surface is a bit of a hack, but it suffices for visualization. The correct way to do it is quite a bit harder, and I haven't had time for it (or found an interested student yet). Here is a description:
The spherical morph was used to generate a correpondence between each vertex in a set of 30 subjects and a supertessalated icosahedron. Each icasahedral vertex was then assigned the average talairach coordinate (using Louis Collins' automated talairach alignment procedure) of all the vertices from the individual subject representations. The process was repeated for the orig, white and pial surfaces. An inflated surface representation was then generated by inflating the white surface (as usual). cheers, Bruce On Tue, 22 Jan 2002, A Zaman wrote: > > Dear Bruce, > > I was wondering how best we can accurately (and fully) describe > the subject 7 average brain? > > 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] > > > *********************************************************/ > >
