[MINC-users] mincresample and minctracc question

[Jason Lerch]

Hi Jim,


> (1) do I need to resample my anatomical volume to match that of the
> functional volume prior to calling minctracc?
>   
Nope.
> (2) when I try to resample the native MRI to the functional, I usually
> get an empty volume out. I suspect that this is related to the
> difference in z-start values, but am unsure how to proceed.  The 2
> input volumes look like this ...
>   
That mincresample call won't work due to the difference in starts and 
steps between the two images - you'll need to compute the transform 
first and then resample.

>
> (3) does minctracc want both volumes to share the same data type (e.g.
> byte) or does this not matter?
>   
This does not matter - though if you need to do mutual information 
registration, then it will reshape them to unsigned byte automatically.
> (4) should I blur the native T1 prior to fitting? ... or does minctrac
> deal with this?
>   
Probably - especially with those differences in initial position you'll 
probably want to use a multiscale algorithm anyway; i.e. first transform 
with quite blurred data, second transform with less blurring, etc.

Hope this helps,

Jason
>
> Thanks,
>
>
> -Jim
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