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A, Graph of the CoW with its component vessels: A1 segments of the ACAs, AcomA, internal carotid arteries (ICAs), PcomAs, and P1 segments of PCAs. The middle cerebral artery (MCA) and the basilar artery are not structurally part of the CoW. B, Complete CoW in a preterm neonate on an axial 3D TOF MRA image.
