"The superior border of the cavernous sinus is often used as an indirect landmark for the distal dural ring. It is best seen on thin slices with high-resolution sequences such as 3D-CISS (T1 C+ or T2) 2,3, 3D T2 SPACE 3, 3D T2 FSE 4 and fusion of MRA with 3D cisternography 5."
"The superior border of the cavernous sinus is often used as an indirect landmark for the distal dural ring. It is best seen on thin slices with high-resolution sequences such as 3D-CISS (T1 C+ or T2) 2,3, 3D T2 SPACE 3, 3D T2 FSE 4 and fusion of MRA with 3D cisternography 5."
"The distal dural ring is an anatomical landmark that separates the extradural from the intradural intracranial internal carotid artery (ICA). It is located at the junction of the cavernous, clinoid and ophthalmic segments of the ICA."