MRI for autism diagnosis?

I've been reading about how there was a study that could diagnose autism using MRI scans of the brain. This doesn't seem to be part of the normal diagnosis process yet. (?)

I had an MRI aout 10 years ago, long before I ever thought about autism. The clinic still has my scans. Is it worth requesting them to be posted to me? Is there any point? I have my second assessment appointment next week.