"It was originally described by Key and Retzius in 1875 and more precisely described by Bengt Liliequist (1923-2008), a Swedish neuroradiologist, in 1956 in his pneumoencephalographic work on cadavers 1,7,9."
"The Liliequist membrane can be visualised in the vast majority of patients on MRI using high-resolution heavily T2 weighted 3D sequences (e.g. constructive interference in steady state (CISS), FIESTA, FFE) 9."
"One extends posterosuperiorly to the posterior edge of the mammillary body (known as the diencephalic membrane); it separates the suprasellar cistern from the interpeduncular cistern 8."
"The second sheet extends posteroinferiorly to the pontomesencephalic junction (known as the mesencephalic membrane); it separates the interpeduncular and prepontine cisterns 8."