I am scheduled to have a CT scan this Friday. I went today for the required pre-test bloodwork and then I picked up the two bottles of barium. I asked some questions about the barium and asked if they would be using the barium instead of the iodine and they said NO they are going to use both. I told them I have an allergy to seafood so what then? They got the tech for me to talk to and she said oh not to worry because they are finding that the iodine is not what peope are allergic to as much as the ion it is attached to. Way over my head here on the ion part. So we talked a bit and then she said oh we will give you 5-10 cc's and see how you do and then rapidly push the the 150cc's during the test. (Now, I am thinking during all this time about my seafood allergy and thinking ahh sometimes if I eat one shrimp I am ok but it I eat a larger quantity then I am in trouble). So maybe the 5-10cc's won't really bother me but when they rapidly push 150cc's then what could happen?I am not a genius but it seems to me that this could be a very dangerous thing to do here. Dr.'s wonder why patient's get much anxiety!!!!!! Oh really!!!!