How to find the calcification?

Hi, I’m looking for some help with finding arterial calcification. I’m working from MRIs, looking for illiac, portal, vena cava, etc. My current process looks something like:

Subtract all vertebrae from the artery (In case of segmentation overlap errors)
Add segment → name = calcification_“segment” → Threshold = 130 to max → editable area = inside segment “segment” → modify other segments = allow overlap

Any advice would be greatly appreciated. Thanks!