[Insight-users] Advice on preprocessing before surface rendering

[Richard Beare]

Hi,

There are a number of possibilities that might be worth a try. All of
them could be attempted before or after thresholding (if you are
applying thresholding as part of the rendering process.

1) median filter
2) Morphological opening
3) Morphological opening by attributes, using volume or area attributes.

play with the kernel size parameters for the first to and the lambda
value for the last and see how you go.

On 9/18/07, Martin Kavec <kavec at messi.uku.fi> wrote:
> Hi,
>
> I have images of the MR angiography of brain, for which I would like to do
> surface rendering of the vessels. The problem is that there is a high
> intensity noise in the lower and central part of the images, which reduces
> the quality of the rendering. Could anybody recommend me some preprocessing
> steps to enhance/segment/something  the vessels before the surface rendering.
> To demonstrate the "quality" of the images I uploaded the montage of 4/180
> slices on web:
> http://www.uku.fi/~kavec/MRA.jpg
>
> Thanks a lot for advice.
>
> Martin
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