I don’t know how good the MRIE is at showing adhesions. In my case it was done because they saw inflammation in my neoterminal ileum on my annual scope and they wanted to get a better idea of the pervasiveness of it above the J Pouch. And also to see if we were basically dealing with inflammation in the neoterminal ileum and a SIBO situation from backsplash stool as they suspected. The MRIE in my case showed a lot of swelling of the bowel walls closer to the J Pouch inlet and not so much upstream.
In your case they seem to be looking for other stuff and diagnostically speaking the capsule endoscopy might be a better test for you although it’s very risky and I in fact refused it back in 2008 or so. The capsule at that time looked too big to even swallow (I saw a sample capsule) but just like with smartphones, the technology on them has improved dramatically since then. I hear that they are much smaller and have better cameras. I would at least inquire about it.
Anyway sorry that the MRIE didn’t give you some better closure on these issues.