Yes, you could use a couple of MPRAGE scans in the different channels.
This would be most beneficial if they provide complementary
information.
However, if the images have the same echo times etc, then you may
achieve better results by working with the simple average of the two
scans. The reason for this is that there is no option to constrain
the algorithm so that the tissue properties of the individual scans
are identical. Therefore, it will estimate means and covariances for
all the tissue types, whereas a more parsimonious model would assume
the same means and variance.
Best regards,
-John
On 7 March 2012 23:24, MCLAREN, Donald <[log in to unmask]> wrote:
> In the new segment toolbox, there is an option for multiple channels and the
> help box describes T1 and T2 as examples of mulitple channels.
>
> Can a single MPRAGE (or two MPRAGES) with different echo times be used as
> the two channels? Or select a single echo time or compute the root mean
> square image of both echos?
>
> Best Regards, Donald McLaren
> =================
> D.G. McLaren, Ph.D.
> Postdoctoral Research Fellow, GRECC, Bedford VA
> Research Fellow, Department of Neurology, Massachusetts General Hospital and
> Harvard Medical School
> Website: http://www.martinos.org/~mclaren
> Office: (773) 406-2464
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