If you have had repeat MRI
over an extended period of time
on a T3 machine using MS Protocol and a lumbar puncture (MRI
of your thoracic, cervical and brain the chances of it being MS would be diminished.
MRI is pretty good at imaging the brain, but not so good at imaging the spinal cord. Usually a good neurologist can tell from examination and what symptoms you are having if your lesions are more likely to be spinal or brain.