I had a MRA of my hip just before Easter. The difference in MRI and MRA is the injection of the Contrast Agent.
The whole procedure was over in less than 2 hours in my case,but as you know everyone has different experiences.
Before the test I asked a lot of questions regarding the Contrast Agent, as I too can be allergic to different medications.
There is a lot of information available online if you google MRA scan.
Did you get a form to fill in? I didn't sign mine until I spoke to the Doctor who was administering the injection. He reassured me completely.
There was no pain at all throughout the whole process as you get a tiny injection of local anesthetic to numb the area.
When he/she is happy that the dye is in the correct place, you go into the MRI machine. It took 25 minutes. It was warm and I drifted off to sleep.
I hope I have been some help norwood1. Feel free to ask any questions you need an answer to.