[Insight-users] segmentation registration
a a
user_itk at yahoo.com.sg
Tue, 17 Feb 2004 18:23:06 +0800 (CST)
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Hi Luis and all,
however, my supervisor insisted on using some form of active contour or deformable solid (B-spline etc.), also i have a volume of mri slices without tagged lines for the first instance, so can i use the active contour to segment the non-tagged volumetric image slices, then track the tagged lines of the images of the same time frame, and combine them together: if yes, how can i handle this problem?
Thank you and Regards
Michael
Luis Ibanez <luis.ibanez at kitware.com> wrote:
Hi Michael,
In order to get a feeling of what kind of
volume rendering approach you want to use
you could test your data with the free
version of VolView.
http://www.kitware.com/products/volview.html
For segmenting the tissue, level sets may
not be appropriate since the tag lines are
probably more intense than the tissue
differences. You can easily figure out the
relative differences by computing the gradient
magnitude of the image. If in the gradient
magnitude, the edges of the tag lines are
more intense than the edges of the tonge,
then it is unlikely that level sets would
be ablo to segment the tonge itself.
You should give it a try to watersheds,
althought this will require some user
interaction/supervision.
You will find examples on watersheds on the
SoftwareGuide and an interactive watershed
segmenation tool in InsightApplications.
I would suggest you to do supervised segmentation
of only one initial tonge dataset. Then do deformable
registration of this dataset with the dataset of the
next time step, and then map the segmenation of the
first one through the deformation field. That is,
perform segmentation via registration with a segmented
model.
Regards,
Luis
---------------
a a wrote:
> Hi to all,
>
> i have a set of tagged MRI slices of a tongue, which i have to render
> the volume and measure the deformation based on the tagged lines. For
> the image processing part, i've decided to use ITK, but i need some
> guidelines as i'm new to this area:
>
> Can the segmentation tools (i.e. GeodesicActiveContour) be used to
> segment the images in 3D (i.e. multiple slices loaded as a volume), are
> there any examples for that?
> As i will need to visualize (VTK) and analyse the deformable solid model
> of the tongue, are there any tools/examples for tracking the deformation
> of the tongue and the tagged lines? Can anyone roughly tell me the steps
> to take to achieve this, thanks.
>
>
> have a nice day
> Michael
>
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<DIV>Hi Luis and all,</DIV>
<DIV> </DIV>
<DIV>however, my supervisor insisted on using some form of active contour or deformable solid (B-spline etc.), also i have a volume of mri slices without tagged lines for the first instance, so can i use the active contour to segment the non-tagged volumetric image slices, then track the tagged lines of the images of the same time frame, and combine them together: if yes, how can i handle this problem?</DIV>
<DIV> </DIV>
<DIV>Thank you and Regards</DIV>
<DIV>Michael<BR><BR><B><I>Luis Ibanez <luis.ibanez at kitware.com></I></B> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid"><BR>Hi Michael,<BR><BR>In order to get a feeling of what kind of<BR>volume rendering approach you want to use<BR>you could test your data with the free<BR>version of VolView.<BR><BR>http://www.kitware.com/products/volview.html<BR><BR>For segmenting the tissue, level sets may<BR>not be appropriate since the tag lines are<BR>probably more intense than the tissue<BR>differences. You can easily figure out the<BR>relative differences by computing the gradient<BR>magnitude of the image. If in the gradient<BR>magnitude, the edges of the tag lines are<BR>more intense than the edges of the tonge,<BR>then it is unlikely that level sets would<BR>be ablo to segment the tonge itself.<BR><BR><BR>You should give it a try to watersheds,<BR>althought this will require some user<BR>interaction/supervision.<BR><BR><BR>You will find examples on watersheds on the<BR>SoftwareGuide and an interactive
watershed<BR>segmenation tool in InsightApplications.<BR><BR><BR>I would suggest you to do supervised segmentation<BR>of only one initial tonge dataset. Then do deformable<BR>registration of this dataset with the dataset of the<BR>next time step, and then map the segmenation of the<BR>first one through the deformation field. That is,<BR>perform segmentation via registration with a segmented<BR>model.<BR><BR><BR><BR>Regards,<BR><BR><BR><BR>Luis<BR><BR><BR><BR>---------------<BR>a a wrote:<BR><BR>> Hi to all,<BR>> <BR>> i have a set of tagged MRI slices of a tongue, which i have to render <BR>> the volume and measure the deformation based on the tagged lines. For <BR>> the image processing part, i've decided to use ITK, but i need some <BR>> guidelines as i'm new to this area:<BR>> <BR>> Can the segmentation tools (i.e. GeodesicActiveContour) be used to <BR>> segment the images in 3D (i.e. multiple slices loaded as a volume), are <BR>> there any examples
for that?<BR>> As i will need to visualize (VTK) and analyse the deformable solid model <BR>> of the tongue, are there any tools/examples for tracking the deformation <BR>> of the tongue and the tagged lines? Can anyone roughly tell me the steps <BR>> to take to achieve this, thanks.<BR>> <BR>> <BR>> have a nice day<BR>> Michael<BR>> <BR>\<BR><BR><BR>_______________________________________________<BR>Insight-users mailing list<BR>Insight-users at itk.org<BR>http://www.itk.org/mailman/listinfo/insight-users</BLOCKQUOTE><p><img src=http://sg.yimg.com/i/sg/icons/16/perhearts.gif> <a
href="http://sg.rd.yahoo.com/mail/tagline/?http://asia.yahoo.com/lavalife"
target=_blank><B>Y! Asia presents Lavalife</b></a><br><small>- Get clicking with thousands of local singles today!</small>
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