filtering code for CTA images

how are you I want to ask how can I found a code for filtering a segmented CTA image to enhance the contrast I Had a CTA image we will segment the coronary arteries then we will filter thanx for help

[fatima ali]

BY FOREXAMPLE USING Frangi Vesselness filter?

[Rik]

Have a read here and here. It will greatly improve your chances of getting an answer.