TrackVis uses LPS coordinate system. But the fiber bundle saved by MITK uses
RAS coordinate system. I managed to edit the dimension of track file, and
translate x and y values in the track file. Finally I got aligned track and
DWI in TrackVis program.
If I¹m correct, I suggest to save TrackVis track file in LAS instead RAS
coordinate system. And use the full dimension of upsampled DWI in 1x1x1
resolution, or maybe native DWI space. All this needs to modify MITK source
code.
Wayne
On 14-04-11 8:50 AM, "Wayne Su" <[email protected]> wrote:
> Hi Christian,
>
> Thank you for the reply. In the MITK-DT, the fiber bundle aligns well with T1
> and DWI. What I¹m trying is to load them into TrackVis. Because the dimension
> of the fiber bundle is no longer same as the one from DWI, they don¹t align in
> TrackVis. I¹m wondering whether there is any option to use the dimension of
> DWI (maybe the upsampled DWI with 1x1x1 resolution) to save fiber bundle. I
> know there are two ways. One solution is to crop DWI to match fiber bundle.
> Another way is to change the dimension of fiber bundle (I¹m not familiar with
> this part). I appreciate any input on this case.
>
> Thanks,
> Wayne
>
>
> On 14-04-11 12:56 AM, "Weber, Christian(1)" <[email protected]>
> wrote:
>
>> Hi Wyane,
>>
>> the fiber bundles are allways in the space of DWI since they are derived from
>> it.
>> Since DWI and T1/T2 often do not match you need to register them, currently
>> the easiest way doing this with GUI is
>> (AFAIK ):
>>
>> Extract B0 image from the DWI and then register the T1 to this B0 image,
>> using e.g. the Point-Based registration.
>>
>> Best,
>> Christian
>>
>>
>> From: Wayne Su [mailto:[email protected]]
>> Sent: Donnerstag, 10. April 2014 20:10
>> To: [email protected]
>> Subject: [mitk-users] Save Fiber bundle
>>
>> Hello experts,
>> Is there a way to save diffusion fiber bundle onto T1 structural space or DWI
>> space, i.e. the dimension of the fiber bundle is the same as the one from T1
>> or DWI? Currently, it saves as reduced dimension with 1mmx1mmx1mm spacing. I
>> tried to load the track file into TrackVis along with T1 image. But the
>> locations of them don¹t match.
>>
>> Thanks,
>> Wayne
>>
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