As a student, they probably don’t offer an INR or neurorads rotation. What I ended up doing was doing a Radiology elective and letting the rotation director know that I was interested in neuroradiology and wanted to spend all 4 weeks in neurorads. On neuroradiology, you could probably watch/participate in some INR procedures as well. I’d just ask. You’re paying buttloads of money and should be able to do whatever you want.