XXXX : an in-vivo 7 T magnetic resonance angiography study.

@entity432 @entity1 @entity1054 @entity6128
OBJECTIVES: To investigate in-vivo @entity432 branching from the anterior communicating artery (ACoA) using @entity1054 ( @entity1054 ) magnetic resonance angiography (MRA) at 7 Tesla. METHODS: Seventy-five subjects, including 15 healthy volunteers and 60 @entity1 , were included in this prospective study. Three raters characterized branches from ACoA in maximum intensity projections of @entity1054 MRA at 7 Tesla acquired with 0.22   *   0.22   *   0.41  mm(3) resolution. Furthermore, course patterns and anatomical features of the subcallosal artery (maximum diameter, length, and branching angle from ACoA) were measured. RESULTS: Branches from the anterior communicating artery were visualized in 63 of 74 (85.1  %) subjects and were identified as the subcallosal artery (93.7  %) and the @entity6128 (6.3  %). The course of the subcallosal artery was classified into 3 groups; C-shaped (55.9  %), straight (16.9  %), and S-shaped (27.2  %). There was a significant difference between the branching angles of C-shaped and straight (p   <   0.0001), between C-shaped and S-shaped (p   <   0.0001), as well as between straight and S-shaped (p   =   0.0113) course patterns. CONCLUSIONS: High-resolution in-vivo 7 T @entity1054 MRA can delineate the @entity432 . Three main variants of course patterns and branching angles from ACoA could be identified. KEY POINTS:     In-vivo 7 Tesla @entity1054 MRA can delineate the subcallosal artery microanatomy     Three distinct course patterns of the subcallosal artery were identified     Branching angles from ACoA significantly differed between subcallosal artery course patterns.
