Last MRI, at least for a while is over with as of a few hours ago. I feel like they've changed a lot since I was a kid. Maybe practices are different now, maybe the children's hospital was just very questionable
When I was a kid going through them, the options were go under, which meant no eating or drinking for 12 (maybe even 24? It's been long enough that I can't remember) hours (obviously not ideal either way), or just simply rawdog it and go in, no meds, having to lay there completely still in a claustrophobic machine on an uncomfortable layout for however long it takes in that cold room
But it feels...very different now. I feel genuinely looked after. They let me take Lorazapam (anxiety meds that tend to make me really sleepy and calm my nerves), give me an eye mask and warm blanket, they give me ear plugs and headphones and put music on (that they let me choose!), it's obviously not relaxing but it's as comfortable as you can possibly get with something like that