[Camino-users] tensor format and get tensor components

[xiaoping qu]

Hi Camino experts,

I am Xiaoping, a new user to Camino.

Since I want the diffusion tensor  components to do registration with
DTITK, I am very interested in tensor type and how to abstract tensor
components from a tensor file.

1. I tried to use dtfit to fit a tensor with Bdouble format and can use
dt2nii to convert Bdouble format file to nifti format.
According your on line documents, I find that the tensor.Bdouble from dtfit
is upper triangle but no idea about the nifti tensor format?
*Can you tell me  that after dt2nii, what type the nifty format tensor is ?
upper triangle or lower triangular? *


*2. If I want to extract tensor components like dxx, dxy, dxz, dyy, dzz
from tensor.nii.gz, what kind of function I can use? *



*3. Aso, according to the online documents about camino, I just
find analyzedti is a command to get individual analyze format components.
If I have the DWI nifti.gz format image and its binary mask(nii,gz) and
scheme file. How can I use analyzedti to get individual tensor components?*

Do I need to fist img2voxel to convert dwi to voxel order as Bfloat file,
and then use voxel2scanner to convert dwi.Bfloat to scanner order as
Bdouble file, and then use AnalyzeHeader to convert Bdouble to analyze
format, and finally use Analyzedti to get analyze format tensor components?



Thanks,
Xiaoping
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