You might want to get a PSE test before the MRI. Supposedly 94% accurate and you can get your PCP or other doctor to order the test for you. I had the test a few weeks ago to check for biological re-occurrence. It took 3 days to get it after the order and about a week to receive the results. It’s FDA approved but fairly new. Some doctors will be aware of it and some not. If you email Joe.Abdo@oxfordbiodynamics.com, the VP of Clinical Diagnostics at the company that makes the test, he can answer further questions and volunteered to do so.