It's probably no consolation @LIttleBlueWren , but the last thing of interest to the rads team is your scars or your state of undress. They are totally focussed on your tattoos and positioning.
I didn't like it either, but I did concentrate on training myself to lie in exactly the right position before anyone touched me. I'm lucky in that regard as I've had years of gym and yoga (that hasn't prevented me getting fat and lazy) but the muscle control and body awareness is still there.
By about session 10 I had it down pat and only needed tiny tweeks, if any. Less time on the table and less interaction with the staff. That's a win. Think about what you are doing, not what about anyone else is doing and it will all pass faster. Mxx