I have had three. The best/easiest one I had the tech stayed in the room with me and did it in 6 stages. She would say this one will take 5 minutes or this one will take 8 minutes so I knew what to expect. She even gave me a button to push if I needed a break.

The worst was the young tech loaded me in he machine(knee MRI), went to another room for lunch not telling me that this was an old unit and it would take 40 minutes. I had a leg cramp and couldn't get his attention so finallyI reached up and hit the big red stop button. That brought him running and I reamed him out all the way out the door and into the waiting room.