Hi @penn, I haven't had an MR Neurography and thank you for helping me with my lifetime bucket list of learning something new every day. While you wait for those with experience having an MR Neurogram, I thought I would share what I have learned.

"What is the difference between MRI and MR neurogram?
Conventional MRIs can sometimes show nerve abnormalities, but MR neurography imaging is more sensitive, since it is specially tailored to image nerves. MR neurography uses advanced techniques to depict small nerves that may not be visualized on standard MRI exams."
--- MR Neurography at Hospital for Special Surgery | HSS: https://www.hss.edu/conditions_magnetic-resonance-neurography.asp

There is also a webinar that explains it's use - https://www.youtube.com/watch?v=i72PIJhQLcs

I have SFN, too, but unknown (idiopathic) cause. This is as confirmed with punch biopsy of calf and upper thigh. I never heard of MS Neurogram. I am hoping to get to a new neurologist for testing of MS and CIDP. SFN can impact autonomic nervous system which can affect lungs, heart and digestion.