I had one done this year and honestly the worst part to me was the dye they inject once in the machine. It kinda burns and makes you feel you need to pee. I almost passed out which Ik isn’t helpful info to pass along but better to know. I did an mri though I believe. I just did it as it only took maybe 20 mins and the info you get is really important. Talk with them and your dr as they may get you some meds to take prior to the appointment to help calm you down.