Hi Sebastien, 

Robust register cannot register a slice into a 3D volume. It can only register 3d to 3d (or 2d to 2d, although that has not been tested much). 
Sorry, 

Martin 

On 30. Jan 2023, at 21:09, Proulx, Jean Sebastien <JSPROULX@mgh.harvard.edu> wrote:

Hello,

I am trying to register a full volume to a single slice, and I follow example 3 of mri_robust_register's help. I get the following error:
 Input image is smaller than min dimension: 1 < 16
 Input dimensions (after conformalizing) MOV: 64 64 64
 Input dimensions (after conformalizing) DST: 64 64 1
 Specify larger minimum ...

This error stays after adding --minsize 1 or --minsize, despite mri_robust_register recognizing the flag, as suggested by this terminal output:
--minsize: Smallest dimension > 0 . 

Registration ran ok when replacing the single-slice with a 40-slice volume.

Any idea on what is going on here?

Thanks a lot for the good work and
Have a good day!
Sebastien
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