I've been trying to figure out how to correctly rotate the Siemens diffusion gradient table to suit oblique slices. I understand that DTK handels that internally. But I also would like to use FSL for motion and eddy current correction first (also rotate the gradient table according to image rotation). So I would really love to know how DTK is handeling the roration of the gradient tables. I've tried many ways, but when I use my corrected gradient table and not let DTK to correct for gradient orientation, I always get wrong fiber track (compare to the the automatically corrected table)

So for example I can extract from DICOM header that the slice orientation is:

(0.7534, 0.4550, -0.4747),(-0.6167, 0.7395, -0.2700)

I'm using standard Siemens 6 direction:

1, 0, 1
-1, 0, 1

0, 1, 1

0, 1, -1

1, 1, 0

-1, 1, 0

Then how could I get a correct gradient table?  What would it be?

Thank you very much.

Jiachen