Tensor element ordering when converting to ANTs from fsl

[aplumley]

Hello,

I am processing some DTI images and followed the instructions on the page Importing diffusion tensor data from other software to convert from FSL into ANTs format.

The header information all looks correct, but the ordering of the elements after using ImageMath ComponentTo3DTensor appears to be in upper-triangular, rather than the lower-triangular that ANTs needs. Is there a simple way to change the order?

Thanks in advance,

Alix

[cookpa]

The ordering is handled by ITK and depends on the output file format. We would need a complete reproducible example with code and data to diagnose any problems.