Visual grading of demarcation of cisternal anatomical structures in Gd enhanced 3D bFFE and 3D PDDE.

Note- Grade 1 = The evaluated structure was “not” discriminated from surrounding structures in any axial plane. Grade 2 = The evaluated structure was discriminated from surrounding structures but contrast is not “good”. Grade 3 = The evaluated structures were clearly discriminated from surrounding structures with good contrast. kappa indicates the interobserver agreement between two readers. AICA indicates anterior inferior cerebellar artery. CN indicates cranial nerve.