[Mristudio-users] crash when saving ROI's

Thu Jul 15 04:42:00 EDT 2010

SC

So that sounds good... i am using AIR though because the MUT doesnt do
anything it gets stuck.... So i am using AIR and 90 for noise reduction
because i heard that's what you have to use for siemens machines....
also affine. tri linear interpolation and standard derivation. So im
just changing the affine and the 90 noise reduction. The images look
ok... bu then again i cant compare it to the MUT because i cant use it.
SC, dont you find it troublesome that when you draw the ROIS in
ROIeditor, the roi selected isnt really what the selection ends up to
be? I mean When you are selecting your pixels and then choose to add as
an object, the object you make is not exactly what you had chosen. Is
there anyway to fix this? i tried reducing the pencil diameter or doing
a fill in the roi and then adding but it always looks kinda crappy...
it's still better than picking the ROIS from dtistudio though... I also
heard that you can edit your rois importing the images from Dtistudio
into ImageJ but i dont know how to do this. Maybe i would try it because
in there you can import the anatomy sequences to draw your rois on top
of them.
anyway, any input in any of these inquiries would be helpful!

best regards

Salvador

________________________________

Von: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] Im Auftrag von [Seongjin]
Gesendet: Mittwoch, 14. Juli 2010 14:47
An: DTI Studio, ROI Editor, DiffeoMap Questions/Support
Betreff: Re: [Mristudio-users] crash when saving ROI's

Salvador,

What I know about difference between AIR and Mutual info based (MUT)
registration, AIR is somewhat sensitive to noise level and has more
options to be determined. What I heard from developer group about the
noise level in AIR is that the noise level should be determined by
empirical way. And it has more options for fitting methods. But which
one works better, you should decide after a couple of trial and errors.

MUT has less option to be determined by user. MUT is based on
information entropy maximization as far as I know. It is one of the good
registration methods. But I have no idea about which one is better
between AIR or MUT. I prefer to use MUT because less user options, which
means it is more automatic. At least, I don't need to play with it to
find a proper noise level for AIR. 

Best,
-SC

On Wed, Jul 14, 2010 at 7:09 AM, Castaneda, Salvador
<salvador.castaneda at med.uni-tuebingen.de> wrote:

	SC

	Sorry again, Do you know if there is such a big difference
between the mutual image registration and the automatic. And what
exactly does this do just improve the quality of the image all together
or what?
	thanks in advanced

	Salvador Castaneda

________________________________

	Von: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] Im Auftrag von Castaneda,
Salvador
	Gesendet: Mittwoch, 14. Juli 2010 12:14 

	An: DTI Studio, ROI Editor,DiffeoMap Questions/Support
	Betreff: Re: [Mristudio-users] crash when saving ROI's

	SC

	Thats exactly what i do, i take the image files from dtistudio
and load them in the roi editor. i wanted to upload an anatomical
picture to better draw y rois because i work with rats. is it possible
to dothis even if the matrix and fov are not the same?
	thanks

________________________________

	Von: mristudio-users-bounces at mristudio.org
[mailto:mristudio-users-bounces at mristudio.org] Im Auftrag von [Seongjin]
	Gesendet: Mittwoch, 14. Juli 2010 01:45
	An: DTI Studio, ROI Editor, DiffeoMap Questions/Support
	Betreff: Re: [Mristudio-users] crash when saving ROI's

	Darren,

	I experienced the similar problem. I wanted to use ROI drawn in
ROI panel but it did not work at all. ROI saving and loading functions
seem to work in FIBER panel, but not in the ROI panel.  

	If you want to use ROI for DTI metrics such as FA or ADC
measurements, I recommend ROIeditor (a companion tool to DTIstudio).
That is more powerful. 

	I always process data in DTI studio. Then load all the processed
data into ROI editor. 
	Finally, do the measurement with ROI editor. 

	The saved ROIs can be reused in the DTI studio for fiber
tracking. However, again, the ROIs could not be used in ROI panel of the
DTI studio on my computers (home computer, laptop, and office computer).

	I hope this experience might be a bit of help for your problem
in using DTI studio.

	-SC

	On Tue, Jul 13, 2010 at 5:28 PM, Darren Gitelman
<d-gitelman at northwestern.edu> wrote:

		Hi

		I am having problems with DTI studio crashing when
trying to save ROI's. 

		This happens after I draw an ROI and click the save
button. Then a dialog (ROI File Format) comes up giving a choice of
different formats. I choose Graphic Compatible (default). After clicking
OK, a crash window comes up a few seconds later. It is labeled MriView3D
MFC application. The only technical information I can find is the
following.

		AppName: dtistudio-latest-x86.exe     AppVer: 1.0.0.1
ModName: msvcr80.dll
		ModVer: 8.0.50727.4053     Offset: 00014458

		This occurs whether I have drawn 1 or more ROIs. (fixed
size ROI, oval).
		The size of the ROI does not matter (4 voxel or 10
voxel)
		It occurs with DTI studio x86 and x64. 
		It occurs with versions 3.0.2 and 2.4.1 of DTIstudio.
		It occurs whether I have a complete dataset loaded 35
directions, or even if I load just 1 image and draw an ROI on it.
		It occurs on an HP core duo 2 system running Windows XP
SP3, and on a redhat linux KVM virtual machine running windows XP x64.
		Reinstalling vcredist_x86 or vcredist_x64 from the
DTIstudio website does not help on any of the systems.

		Any suggestions on how to fix?

		Darren

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