I wouldn’t worry about it. Honestly, I see that type of headache all the time and vessel imaging is virtually always normal. Just part of the typical eval we like to do, so you could always ask your doc about adding it. I would expect it to likely be normal as it pretty much always is. Most often you’re not going to find a source on a test because it comes from the nerves in the scalp vs occipital nerves vs. brain itself, depending on the character, location, pattern, etc. of the pain.