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Axial fast spin echo (FSE) T2WI of the right orbit demonstrates high T2 signal expanding the dural sheath of the optic nerve. As most standard brain MR studies will have only axial T2 images, which are usually non-contiguous (i.e have a skip between slices), the optic nerve will not always be captured in an image. Coronal images are often helpful, (e.g coronal T1WI of same patient - see below) demonstrating a cuff of CSF signal surrounding the optic nerve.