[Insight-users] Segmentation/colliding filters/FAst marching

[Luis Ibanez]

Gaurav,

Yes, it certainly helps to have a contrast agent in an
angiogram. (otherwise there is not an easy way to
identify the vasculature).

Hopefully the bolus of the contrast agent is relatively
uniform along the vessels that you are trying to segment.

Please give it a try at the filters that we have recommended
and let us know if you find any problem.


    Thanks


         Luis


-----------------------------------------------------
On Wed, Feb 17, 2010 at 6:02 PM, Gaurav Sharda
<gaurav.sharda.uiowa at gmail.com> wrote:
> Yes, We are using 2D angiograms with contrast agents. Would this help in any
> way?
>
> Thanks,
> Gaurav.
>
> On Mon, Feb 15, 2010 at 9:03 PM, Gaurav Sharda
> <gaurav.sharda.uiowa at gmail.com> wrote:
>>
>> Hi!
>>
>> Hey one quick doubt. When we apply the colliding filter with one seed
>> point in the aneurysm and one in the vessel then a line between the two will
>> be traced.
>> After that if we apply the quick marching segmentation to detect the
>> inflated region of the aneurysm, then which seed points have to be selected?
>> and would there be any overlapping between the two methods used?
>>
>> Also, in the colliding filter if we give one end point on one end of the
>> artery and the other at  the other end of the artery then wont it go over
>> through the inflated portion of the image as well because it is of the same
>> intensity as the beginning point of the artery? Or will it sketch a straight
>> line between the two seed points?
>>
>> Ans also if possible a quick short summary about the level marching
>> segmentation method as it looked a little confusing in the application. If
>> you could explain it in context with the cerebral aneurysm that would be
>> thoroughly appreciated.
>>
>> THANKS A LOT!!!!
>>
>> Reallly thank you,
>>
>> Regards,
>>
>> Gaurav.
>>
>
>
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