[Mristudio-users] comine the high resolution 3D image with the DTI image

[susumu]

Hi Jinsong,

I don't quite understand your question either, but do you mean how we can
co-register 3D anatomical images such as MPRAGE and multi-slice DTI data?

If that is the question, you first have to adjust the 3D anatomical image so
that it has the same dimensions and pixel sizes as DTI.

For example, suppose you have Sagittal MPRAGE with 256x256x120 with 1mm
isotropic resolution and Axial DTI with 256x256x60 with 1x1x2.5mm. You have
to change MPRAGE to 256x256x60 / 1x1x2.5 mm / Axial. You can do the opposite
(change DTI to MPRAGE dimension), but this way is easier.

You can use functions available in Landmarker to do this type of resampling.
Also, make sure that the center and angles of the images are the same.
Otherwise, even if the matrix dimensions are all adjusted, brain locations
are not the same. You can read the center and orientation information from
DICOM files and type in these numbers to Landmarker "translation" and
"rotation" operation. Otherwise, you can use "AIR" to do rigid alignment
between MPRAGE and DTI (you can use b0 or DWI). AIR can adjust matrix
dimensions and brain locations all at once. So, this could be an easier way.


-----Original Message-----
From: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] On Behalf Of darshan pai
Sent: Friday, May 09, 2008 12:17 PM
To: DTI Studio, ROI Editor, Landmarker Questions/Support
Subject: Re: [Mristudio-users] comine the high resolution 3D image with the
DTI image


What do you mean by 3D image ?

There are actually various ways depending on what
format you have.
DICOM format will require you to key in the gradient
values in the text area provided.
dpf files is convenient which can be used for Analyze
as well as RAW image.

I am not sure abt 3D, but if you are referring to
registration then DTIStudio dont do it . Not that i
know of ..
--- jinsong tang <tangj
insonghn at yahoo.com.cn> wrote:

> Hello,
>    
>   I want to use DTIstudio to do fiber tracking. I
> have 2 kinds of dada: DTI and 3D. So, how to comine
> the high resolution 3D image with the DTI image?
>    
>   jinsong
> 
>        
> ---------------------------------
>  ÑÅ»¢ÓÊÏ䣬ÄúµÄÖÕÉúÓÊÏ䣡
> > _______________________________________________
> Mristudio-users mailing list
> Mristudio-users at mristudio.org
>
http://lists.mristudio.org/mailman/listinfo/mristudio-users
> 



 
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