Survivor since 2013
That's how mine was done. You will be positioned on the table like you were for your SIM appointment, they will use the tattoos they placed to make sure you are lined up properly. You will have your hands above your head grasping onto handles. You just have to lie still while the machine does all the work. They should explain everything to you before starting. The tech will be in an adjacent room but they can watch you and there is an intercom so if you have problems they will also be within earshot.