[Mristudio-users] The difference of ROI tracking and Fiber tracking

[susumu]

Hi Eun,

 

In DtiStudio, all fiber tracking from all pixels (with FA values above the
threshold you set) is complete in the beginning. While you are drawing ROIs,
it is just a procedure to visualize fibers that penetrate the ROIs.

 

The "Fiber tracking" button is to redo the initial fiber tracking. If
tracking is going well in the first run, you don't have to touch this button
anymore because it will just redo the entire tracking again.

 

You use this tracking button only when you want to change the setting of the
tracking such as changing the FA threshold.

 

Once you extract fiber you want to see using ROIs, you can save the ROIs and
tracking results. When you want to save the tracking results, you have
choices to save all tracking results or only the one you extracted by the
ROIs. You also have choices for the file formats. If you want to load the
fibers and edit them in the future by adding more ROIs, you have to save
them using the DtiStudio format. Once you convert the data to a binary
format (1/0 for each pixel), the streamline information is lost and you
can't edit the fibers anymore.

 

Hope this helps.

 

Susumu

 

  _____  

From: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] On Behalf Of eunkyung kim
Sent: Thursday, December 11, 2008 5:20 AM
To: Mristudio-users at mristudio.org
Subject: [Mristudio-users] The difference of ROI tracking and Fiber tracking

 

Dear all 

 

Hi. I have tried to Fiber tracking(FACT), but I wonder the difference
between two things. 

When I use ROI-shape button, I can see some ROI tracts drawing. 
But as you know, DTI-Studio has Fiber Tracking(FACT) button, too. 

I can't see the difference between two things. what can I do to solve the
problems?

The processes I used
1. Loading FA and vector map and generate color map
2. In Fiber tab, draw ROI tracts. (selected, show fibers on 2D images,
ROI-Drawing Enable, Multiple-View of ROI) 
3. save maps in two ways. 1)ROI-Operation save (Binary maps)
                                       2)using save button next to the Fiber
tracking(FACT)
4. Fiber tracking(FACT) button 
5. load Binary map using load buttion in the ROI-Operation

Then I should find some thing changes on screen, but I don't.
Please let me know..


 

Eun kyung Kim 

 

 

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