Neurorad here.
For certifying, I did board vitals, re-read 'A Core Review: Neuro", and did Sulcus. Board vitals was kinda meh. It wasn't particularly hard, which but was reflective of the difficulty of the "essentials of radiology" portion of the test. I guess it was nice for seeing questions in other areas of neuro. Sulcus was garbage. Most of the material it focused on was esoteric. The "A Core Review: Neuro" book was solid and I reread it again for the Neuro CAQ.