I agree with whoever said that it would be impossible to get a toddler to have an MRI without a GA.

My bub was only just 8 weeks old when he had an MRI. They had to a put a line in him in case they needed to give him a GA but luckily I managed to get him off to sleep and he slept through it - amazing I know! They put wee ones into a bean bag type thing and then suck the air out of it so they don't move. They also have little earmufs on. I was allowed to sit in the room with him. It was agonizing and horrible (sorry to put you off) and I hated every minute of it. But it was worth getting the all clear and knowing he was okay. It wasn't until it was all over that I burst into tears and let it all out.

Sorry I can't offer any ideas or (real) support but I hope it all goes well for you. Us mums are strong when we need to be and it will be you who is more worried about it all than your little one.