[Insight-users] about reorientation of DTI data

[Torsten Rohlfing]

Hello Hai!

There is no such functionality in ITK (at least the last time I 
checked). In general, the re-orientation problem is related to tensor 
interpolation, because it typically arises when you try to reformat a 
tensor field according to some coordinate transformation (e.g., between 
different subjects).

Here are some publications that suggest methods for reorientation:

D. Xu, S. Mori, D. Shen, P. C. van Zijl, and C. Davatzikos, “Spatial 
normalization of diffusion tensor fields,” /Magnetic Resonance in 
Medicine/, vol. 50, no. 1, pp. 175-182, 2003.

D. K. Jones, L. D. Griffin, D. C. Alexander, M. Catani, M. A. Horsfield, 
R. Howard, and S. C. R. Williams, “Spatial normalization and averaging 
of diffusion tensor MRI data sets,” /NeuroImage/, vol. 17, no. 2, pp. 
592-617, 2002.

It shouldn't be too hard to implement one of these in ITK, because you 
have the essential data structures (tensors) and numerical tools 
(eigensystem computation) already available.

Best,
Torsten

> Hi everyone: 
>     
>         I am now doing some work about re-orientation of DTI data. Does anybody konw whether there has been some softwares or programs to do that work?  Does ITK have such function?  Otherwise,  dose anyone give me some clues about  interpolation of  DTI data?  Is it  reasonable to interpolate the tensor data just like the common scalar data?  
>
>        Any advice or  clues will be appreciated. Thanks very much!
>
> Best, Hai
>   


-- 
Torsten Rohlfing, PhD          SRI International, Neuroscience Program
 Research Scientist             333 Ravenswood Ave, Menlo Park, CA 94025
  Phone: ++1 (650) 859-3379      Fax: ++1 (650) 859-2743
   torsten at synapse.sri.com        http://www.stanford.edu/~rohlfing/

     "Though this be madness, yet there is a method in't"


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