Does a white upward (point up) Triangular shaped spot in the bottom section of a MRI/MRA image indicate Superior Sagittal Sinus Thrombosis (SSST)? Some picture I also noticed the same thing on the top of my brain but the point to the triangular shape is pointing downwards. I have been having chronic migraines for 7 years every day practically and am lucky if it feels like it s just a bad headache. The people that did my MRI/MRA gave me a disc with special software of my images and there are 60-70 images of this bright white triangular shape in the Superior Sagittal Sinus of my brain. Note: The software with my images is complicated and at first only shows 26 pictures on it, but then I accessed a option on it by accident and found about 300-400 more pictures in categories and subcategories, so I think it would be easy for someone to miss or skip them.