Hey, I am going to preface this by saying I am not a doctor but I just recently went through the whole "MRI" thing where my doctor sat down and explained my MRI's and pointed out the actual Chiari. I would say it is kind of hard to see by these MRI's but it seems like she might have a slight Chiari. What my neurologist said is if you draw a straight line from the bottom of one side of the skull to the other, if anything hangs below that line, it could be chiari. Of course, the best thing to do is go to another doctor and get another opinion. Hope this helps!