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24.11.2015 | Magnetic Resonance

Microanatomy of the subcallosal artery: an in-vivo 7 T magnetic resonance angiography study

verfasst von: Toshinori Matsushige, Bixia Chen, Philipp Dammann, Sören Johst, Harald H. Quick, Mark E. Ladd, Michael Forsting, Ulrich Sure, Karsten H. Wrede

Erschienen in: European Radiology | Ausgabe 9/2016

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Abstract

Objectives

To investigate in-vivo microanatomy of the subcallosal artery branching from the anterior communicating artery (ACoA) using time-of-flight (TOF) magnetic resonance angiography (MRA) at 7 Tesla.

Methods

Seventy-five subjects, including 15 healthy volunteers and 60 patients, were included in this prospective study. Three raters characterized branches from ACoA in maximum intensity projections of TOF MRA at 7 Tesla acquired with 0.22 × 0.22 × 0.41 mm³ 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 accessory anterior cerebral artery (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 TOF MRA can delineate the microanatomy of the subcallosal artery. Three main variants of course patterns and branching angles from ACoA could be identified.

Key Points

• In-vivo 7 Tesla TOF 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

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Titel: Microanatomy of the subcallosal artery: an in-vivo 7 T magnetic resonance angiography study
verfasst von: Toshinori Matsushige
Bixia Chen
Philipp Dammann
Sören Johst
Harald H. Quick
Mark E. Ladd
Michael Forsting
Ulrich Sure
Karsten H. Wrede
Publikationsdatum: 24.11.2015
Verlag: Springer Berlin Heidelberg
Erschienen in: European Radiology / Ausgabe 9/2016
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-015-4117-1

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Microanatomy of the subcallosal artery: an in-vivo 7 T magnetic resonance angiography study