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Bilateral asymmetric subdural effusions with signal intensity higher than the CSF, right greater than left. No signs of subdural hemorrhage. Pachymeningeal thickening and homogeneous symmetric dural enhancement. Dural venous distention was noted involving the right transverse sinus (venous distention sign). A subtle decrease of fluid is seen within the optic nerve sheaths. No evidence of tonsillar ectopia.
The CSF spaces are of normal size. Gray-white matter differentiation is normal. Nonspecific white matter hyperintensity was seen in the right occipital periventricular white matter.
No midline shift. No infarction or bleeding. The major vascular voids appear unremarkable.
Features are in keeping with benign intracranial hypotension.