I had MRI a lot of times (I have MS). Every single time as we are walking to the machines, the nurse / technician / whoever asks me a couple of questions (which

I had MRI a lot of times (I have MS). Every single time as we are walking to the machines, the nurse / technician / whoever asks me a couple of questions (which I have to fill before going in as well). Then I have to take off my clothes in the changing room. They would have never missed it. And no one can just simply walk into the corridor (there is a door) that has the door to the MRI machine. Even if they do so, they would be noticed immediately.