[Insight-users] Region Growing filter just for a region in the image

Tue Mar 22 05:11:26 EDT 2011

Hi,
 I have several dicom images,one is a mprage 3D (256x256x176)another one is a t2 3D (512x512x176)another on t1 3D (352x512x160)
I've read in the user guide and in some older posts that  for example for ConfidenceConnectetd it is important to find the right multiplier and to use as few iteration step as possible. So i played with the parameters, but most of the cases either i get to few pixels in the neighborhood, or too many and mostly my problem is that the region to be segmented in very close the some other regions that have similar grey values.     So i guess just a simple Region Growing will never do the work for me.But if you do have a better suggestions i will be very happy,   Ella

--- Sergio Vera <sergio.vera at alma3d.com> schrieb am Di, 22.3.2011:

Von: Sergio Vera <sergio.vera at alma3d.com>
Betreff: Re: [Insight-users] Region Growing filter just for a region in the image
An: "Ella Maria Kadas" <ella_kadas at yahoo.com>
CC: "Insight-users" <insight-users at itk.org>
Datum: Dienstag, 22. März, 2011 10:39 Uhr

Hello,What kind of image are you trying to segment? ConfidenceConnected depends heavily on the multiplier settings... a big multiplier will end with all the voxels on the image being included in the segmentation.In order to help you a bit more we should know wich images and what parameters you are using.

Regards

On Tue, Mar 22, 2011 at 7:50 AM, Ella Maria Kadas <ella_kadas at yahoo.com> wrote:

Hi,

   I am trying to use in a processing step the region growing filters in a 3D image. My problem is that no matter which filter i use from the ThresholdConnected, ConfidenceConected or even NeihborhoodConnected and no matter how i set the parameters i always get in some cases sometimes almost the hole image.

   Even if i doesn't seem that the points are related as neighbors and grey values. 
   So i was wondering if there is some way the define like a bounding cube, in order to do apply this filters only on a volume cut from the image.

   I suppose i could create a new image only containing this cut, i am just afraid that i will get in trouble then to go back with the segmented region in the right position on the original image.
    Is there some other good way to do
 this?
Thanks,
Ella

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-- 
Sergio Vera

 Alma IT Systems
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