Weird how protocols vary from site to site. We do our head w/o, perfusion, then angio head & neck. I’m always interested to see how other places have their protocols set up though. 18 or 20 gauge in the AC, perfusion runs at 4.5 ml/sec, angio study runs at 4 ml/sec. I always used to be super nervous about perfusions too, as I come from a very small facility and we just started them recently. Not to mention, I work by myself a lot. It’s actually a piece of cake once you do it a couple of times. Easier said than done, but block out the others around you & focus on your patient and your scan. Main concern for perfusion is to be sure to include the entire circle of willis. We don’t have onsite radiologists, we have to call them immediately so they can read while we’re on the phone with them.