I found Advantage-IR on the internet (they are in Texas and Scottsdale), and they seem like a pretty professional organization. But their ads and webinars make me wonder if they are just a "mill", trading quality for quantity. Does anyone have experience with them?
Make sure the IR uses cone beam in the procedure. If they perform the procedure using DSA only, I would go elsewhere. It is possible the beads can go to a untargeted area. I know because I was harmed.