Welcome to this forum. Sorry to hear about your health concerns. You have found a great place to do some reading as well as ask questions. I am curious as to why your dr only wants a brain scan, and if you wonder why. That should be a question you need to ask him or her. Myself, I have lesions in my brain, neck and spine. I just wonder myself why it would only be a brain scan. You should be able to insist that a full cns mri is conducted. When my was ordered it included the full cns. Actually when the started the scan on my spine and neck, the radiologist stopped the scan and I had to stand up so he could tape gel capsules at 1 inch segments down my spine. I asked why... he said it just a better picture of the spine. Later found out by the neuro he wanted to see the distance between lesions. Ask questions... you will find some answers you seek.