Hi,
Talairach.xfm is a text file which contains a transformation
matrix. Though there is small numerical difference between two
transformation matrix made using mritotal and the default
Talairach registration. The process of calculation the ICV may
amplify this difference since it used the determinate of the
transformation matrix to calculate ICV. The differences in ICV may
depend on how different the numerical values of the Talairach
transformation matrix are.
Best regrards
Knut J
On 12/14/2012 09:06 PM, Eric Cunningham wrote:
Hi,
this link:
http://surfer.nmr.mgh.harvard.edu/fswiki/TalFailV5.1
discusses a solution to bad talairach.xfm transforms, the
-use-mritotal flag.
this link:
http://surfer.nmr.mgh.harvard.edu/fswiki/eTIV
mentions that the talairach.xfm is used to calculate the total
intracranial volume.
is using mritotal likely to result in significantly different
intracranial volumes even if the talairach.xfm does not appear to
be very different when viewed?
thanks much,
-eric
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