[Mristudio-users] Saving of ROIs in DTI studio

[Hangyi Jiang]

hi,

seems that this question brings a discussion in this community,   I'd copy my reply to Petya here:

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hi, Petya,

you can save them as "Binary Map", in this way, you will get two ROI-image files (.dat) and one plain-text file (.map).  the 1st_ROI file is the ROI with "OR" operation, the 2nd is the one with "AND" operation.  the ROI-image can be loaded in using "File->MriView3D" command -> file format = RAW; data type = Byte"...;   the ROI area is marked with non-zero value (you may need right clicking on 2D image area -> Image level ->..",  adjusting the image level to make ROI be visible.

when you draw ROIs for fiber selection,  the ROIs may disappear if the ROIs has no overlapped region when "AND" operation is being used, only the selected fibers are shown (if there are any).  Why?  because it is designed for "Fiber Selection", not ROI-Displaying  ;)

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in some cases, it would be helpful if individual ROIs are shown with selected fibers.   thank you all for this valuable comments.   we will consider this in the updated version.


regards,

hangyi




________________________________________
From: mristudio-users-bounces at mristudio.org [mristudio-users-bounces at mristudio.org] On Behalf Of Petya R [petya_dti at yahoo.com]
Sent: Wednesday, February 09, 2011 1:30 PM
To: mristudio-users at mristudio.org
Subject: [Mristudio-users] Saving of ROIs in DTI studio

Hello,

We are trying to save ROIs that we generate in DTI Studio (through the "Fiber" tab), and later be able to view the ROIs.  We have two non-overlapping ROIs: for the first ROI we select the "or" button (under "ROI-Operation"); and for the second ROI, we select the "and" button.  (Btw, after the second ROI is drawn, it disappears from the 2D view on which it is drawn).  So this method shows the fibers that go through both ROIs.

However, we're not able to save these two ROIs, and view them later.  At best, we could save the first ROI, immediately after drawing it.  If we use the "save" button (under "ROI-Operation") after drawing the second ROI, and try to load up the ROI file in DTI Studio or ROI editor, we either see only the first ROI, or get the error message "There is no ROI data.", depending on the file format...

Please let me/us know if you have any suggestions, as to how to save both ROIs and be able to view/load them later.

Thank you very much for your help!
Petya