3d ventricle?

These are coronal views from MRI head-shots last fall. I think the third ventricle is the little opening indicated by the red circle. Hard to believe you could tell much about the size of the little guy from a sonograph, but I'm not a professional. I've also got some MRI films from way back (1993?); I wonder how they'd compare.

More data on Tysabri: MRI outcomes

New data indicate that Tysabri reduces both quantity and volume of lesions showing up on MRI examination, as compared to placebo. Here's a link to the abstract.

I wonder how that compares to the CRABs.