Dural Arteriovenous Fistula

The goal of this observational study is to learn whether intracranial dural arteriovenous fistulae, abnormal connections between arteries and veins in the covering of the brain, may affect a brain's waste-clearance system, known as the glymphatic system. The main question it aims to answer is: "Does glymphatic system function change after routine endovascular embolization of an intracranial dural arteriovenous fistula?" Participants who are already scheduled to receive endovascular embolization as part of their regular medical care will undergo advanced brain MRI before treatment and again about 6 months after treatment. Researchers will compare the MRI findings before and after embolization to explore whether treatment is associated with changes in glymphatic-related brain imaging markers.