MRI/MRV is the diagnostic tool of choice for this type of pathology at our facility. This is an occlusion of one more parts of the cerebral venous supply that carries blood away from the brain. This can restrict flow and cause a stroke in severe cases and many times can be hemorrhagic according to an article on WWW (HTTP://EMEDICINE.MEDSCAPE.COM/ARTICLE/338750). I have done numerous of these types of studies for patients presenting with headache. I have seen only few positive cases which may be a hand full a year and most had risk factors such as taking oral contraceptives, pregnant, or postpartum. Here is a young female (which was on oral contraceptives) who presented with a severe headache and was found to have a positive finding of a sinus thrombosis. We do both MRI and MRV imaging of the head and brain typically in our protocol. The MRV images shown were just TOF ran perpendicular to flow and with an inferior sat band to avoid arterial flow.
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