colliding fronts under-segement where the vessel bends a lot

hi, guys,
I use colliding fronts to initialize the segementaion on 3D DSA of intracranial blood vessels.
But I found there was serious under-seg where the vessel bends a lot,

Anyone else know the solution to the problem? Thanks so much for your advice.

If you have such perfect image quality then you can segment the vessel very easily using thresholding (or if you want to be very fancy then using Grows from seeds effect or Fast marching effect) in 3D Slicer’s Segment Editor.

hi, Lassoan
Thank you for your reply.
Yeah, DSA is much better than MRA or CTA in image quality. But I want to use the robust method to make seg results very robust and make results consistency, while threshold or grows rely heavily on the threshold setting.
Of course , I have tried fast marching on same data, it dose much better but it include all branches. I also want to use colliding fronts on MRA and CTA.
I just want to know if it is resonable for the collding fronts has such under-seg result on the bending part of vessel even on so much better image quality. And how to resolve?

Look forward to your reply, thank you!

For me, colliding fronts algorithm performed very poorly (I could not get any useful result from it). However, I’m not sure that I used it optimally, or my images fulfilled all the prerequisites of the algorithm. I just switched to use a combination of tools in Segment Editor in 3D Slicer that provides good segmentation for all the cases.