Best tests for suspected MS without brain lesions on MRI?

I got diagnosed with a mri and ct scan

Luckily after I had paralysis in my right leg my pcp referred me to a neurologist. After the neurologist asked me a few medical questions about my history he said I had Ms. I was 19 and didn't really know anything about ms. Once I had an mri to be sure it was confirmed. Apparently I was very fortunate compared to the horror stories from others.

(Even tho I do have brain lesions, they were stable at the moment so lumbar was the the confirming test)

Here in Los Angeles I was diagnosed with MS by a neurologist who is also a researcher. She said gold standard for diagnosis is MRI plus the lumbar puncture. I went to another neurologist and he looked specifically at my lumbar puncture results to confirm I *really* had MS.