[Mristudio-users] fiber tracking and tensor transformationalgorithms

[Yi Jiang]

Thank you very much, Xin.

May I also have the reference to the fiber tracking algorithm (FACT or 
other?) used in DTIstudio?

Thank you!

Yi


----- Original Message ----- 
From: "Xin Li" <xli16 at jhmi.edu>
To: "Yi Jiang" <yj3 at duke.edu>; "DTI Studio, ROI Editor, Landmarker 
Questions/Support" <mristudio-users at mristudio.org>
Sent: Friday, August 28, 2009 4:36 PM
Subject: Re: [Mristudio-users] fiber tracking and tensor 
transformationalgorithms


> Hello,
>
> To understand the tensor transformation algorithm, please refer to this 
> paper.
>
> Spatial Normalization of Diffusion Tensor Fields
> by Dongrong Xu, Susumu Mori
> Magnetic Resonance in Medicine 50:175-182 (2003)
>
>
>>  Another two small questions about LandMarker:
>>  1. Is the overall matrix combining AIR transformation and LDDMM in
>> the same
>>  format as LDDMM raw?
>
> Yes.
>
>
>>  2. I found two channel LDDMM finished much faster than single channel
>> LDDMM
>>  (2 channels in about 2 hours, and single channel ain bout 48 hours).
>> Is that
>>  normal? I am just curious.
>
> It is not normal. It shouldn't take 48 hours to process any data. Please 
> try again. If you still have the same problem, please let me know.
>
>
> Xin
>
>
> ----- Original Message -----
> From: Yi Jiang <yj3 at duke.edu>
> Date: Friday, August 28, 2009 4:21 pm
> Subject: [Mristudio-users] fiber tracking and tensor transformation 
> algorithms
> To: "DTI Studio, ROI Editor, Landmarker Questions/Support" 
> <mristudio-users at mristudio.org>
>
>
>> Hello,
>>
>>  I am using DTIstudio to track fibers and using LandMarker to register
>> the
>>  brains and transform (reorient) tensors in each brain by the overall
>> matrix
>>  combining AIR linear affine and LDDMM.
>>
>>  May I have a simple description about the fiber tracking algorithm
>> (FACT or
>>  other?) in DTIstudio, and the tensor transformation (reorienting
>> )algorithm
>>  (preserve the principal direction? or other?) in LandMarker? And I
>> would
>>  like to have the references to the above algorithms (tracking,
>> registration,
>>  and tensor transformation) so I can cite in my paper.
>>
>>  Another two small questions about LandMarker:
>>  1. Is the overall matrix combining AIR transformation and LDDMM in
>> the same
>>  format as LDDMM raw?
>>  2. I found two channel LDDMM finished much faster than single channel
>> LDDMM
>>  (2 channels in about 2 hours, and single channel ain bout 48 hours).
>> Is that
>>  normal? I am just curious.
>>
>>  Thank you very much for your help!
>>
>>  Best,
>>  Yi
>>
>>
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>