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!