Always ask for your imaging data. I have never been denied it. Then take that and run it through your own analysis. Years ago I had some lab work done looking for a specific genetic marker that could explain something. While that was running I took my 23andme genome and cross referenced it with snpedia and had my answer (didn't have the marker) before my doctor did. She was blown away. This was 10 years ago. I'm guessing things have improved quite a bit.