Now that neurologists have discovered that perfusion MRI's (p-MRI's) are more sensitive to detecting Behcet's neurological involvement in the brain, fewer specialists will rely on regular MRI's alone to say a patient doesn't have evidence of neuro-BD.
In this 2012 study, many Behcet's patients with negative MRI's showed silent neurological involvement when p-MRI's were used. Using p-MRI's could also prove why many Behcet's patients have frequent, severe headaches and mild cognitive (thinking, memory) problems even though their other neuro tests come back normal.
ncbi.nlm.nih.gov/pmc/articl...
If you want to see the p-MRI color photos of Behcet's neuro involvement, go this this webstie and click on "Full Test PDF" in the upper right.
hindawi.com/journals/tswj/2...
Back when I was having significant Behcet's CNS symptoms, I remember one pompous neurologist who pointed at a normal MRI of my brain and told me, "The pictures don't lie. Nothing's wrong with you." I was so mad at him because I knew something was very wrong and that I wasn't imagining it.
Now we know that pictures DO lie if you're not using a test sensitive enough to find the problem.