I have an MRI Thursday Oct, 6 I am hoping they will be able to tell me more about my SPMS if it is progressing ? And how much ?

Or rather, advancement doesn't, other than changes in atrophy.

Typically SPMS doesn't show up on the MRIs.

How much ? depends on insurance, we once reduced an 10K mri down to 0. How? I simply didn't have the $. and they caved. Good luck!

Do you have an upcoming mri, or are you asking about what the results mean?