Like I said, wanting an answer is fine. It's working yourself up or making yourself nuts/sick (exacerbating your condition/symptoms) over not getting one that serves no purpose.

We never know what new technology/advances may occur; people working on them tend to keep mum until the timing is right (medical research can be cutthroat). Just as an example (not that it applies to your situation), there are now standing/vertical MRIs; they've only been around a couple years now, so I expect there will be further advancements addressing their shortcomings within a relatively short time.
http://www.youtube.com/watch?v=M2wvFTpmSKc

Some new development could come along at any time that would enable your doctors to get a better look at and DX of what's going on.

Then again, it still might not matter treatment-wise...

I'm in the same boat waiting for some new treatment option; currently I'm inoperable because the risk is too high. I check with my docs once or twice a year to keep abreast of any new developments/techniques that might change things, but in the meantime, I'm getting on with my life as best I can. I can't pull a Disney, and I'm just not going to obsess over it. I'm trying instead to make the best of every day that I can, and finding joy and enjoyment at every opportunity.

Doc