[Insight-users] Segmentation of CT data

[Sergio Vera]

Hi
The MultiScaleHessian Family of filters in ITK has a way of detecting
plate-like structures (
http://www.itk.org/Doxygen320/html/classitk_1_1HessianToObjectnessMeasureImageFilter.html#_details)
so maybe the table can be detected as a high response to that kind of filter
at the adequate scale. Give it a try to see if it works.
The advantage is that no seed points would be required to to this.

HTH

2011/4/6 Lodron, Gerald <Gerald.Lodron at joanneum.at>

>
> Hi
>
> I do not want to segment heart, lung etc seperately, i want to segment
> human vs background/patient table, especially for CT head data.
>
> I don't think that this is a so special problem, in my opinion every time
> you want to register a ct data set you need such a segmentation for
> excluding background so i think this a very common task. I already wrote a
> segmentation algorithm based on the itk region grower with seed points in
> the image center but i get sometimes problems with the patient table (and i
> want it 100% automatic) so before i make complicated algorithms i want to
> first ask the community.
>
> best regards
>  ------------------------------
>  *Von:* insight-users-bounces at itk.org [mailto:
> insight-users-bounces at itk.org] *Im Auftrag von *Jon Haitz Legarreta
> Gorroño
> *Gesendet:* Mittwoch, 6. April 2011 10:48
> *An:* insight-users at itk.org
> *Betreff:* Re: [Insight-users] Segmentation of CT data
>
>
> Dear Gerald,
> the segmentation problem is highly specific and depends on the tissue you
> wish to segment. If you want to segment every organ/tissue in a CT dataset,
> I would dare to say that you will need to look for the most suitable
> algorithm for each of them.
> The ITK Software Guide presents an interesting range of segmentation
> algorithms that you can use your starting point.
>
> So there is not a one-for-all, all-purpose algorithm. Segmenting all
> tissues you may have in a certain volume can be hard work.
>
> That said, I haven't had the opportunity to approach the patient-table
> removal problem. But if your requirements allow for some user interaction,
> you can imagine the user selecting a volumen of interest that excludes the
> table (may be too optimistic), or the user picking some seed points on the
> tissues you want to segment and the developping some of your algorithms
> around these points (this would be a typical starting point for the region
> growing algorithm you used). Granting the user some control when overflows
> occur could also be helpful.
> That way, in principle, you could avoid the problem. But I agree that it
> may not be that easy.
>
> Best regards,
> JON HAITZ
>
>
>
>
> El 05/04/2011 15:51, Lodron, Gerald escribió:
>
>
> Hi
>
> Is there a "state-of-the-art" segmentation filter for robust segmentation
> of the human body (with lung etc. without patient table) in a CT data set in
> ITK? I am pretty sure that I am not the first one which needs that...
>
> If not, does anyone knows a good algorithm for that. I made one on my own
> with region growing but get sometimes problems with the patient table...
>
> best regards,
> Gerald
>
>
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-- 
Sergio Vera

 Alma IT Systems
 C/ Vilana, 4B, 4º 1ª
 08022 Barcelona
 T. (+34) 932 380 592
 www.alma3d.com
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