Not much for the vessels I've described. The main variants involve hypoplasia of anterior communicating, posterior communicating, or the proximal segments of the posterior cerebral arteries. But there is of course variation, knowledge of which is critical for neuroangiography and neurosurgery. I would refer you to:
Normal Variants of the Cerebral Circulation at Multidetector CT Angiography
Simon J. Dimmick, BPthy, MBBS • Kenneth C. Faulder, MBBS, FRANZCR
Not much for the vessels I've described. The main variants involve hypoplasia of anterior communicating, posterior communicating, or the proximal segments of the posterior cerebral arteries. But there is of course variation, knowledge of which is critical for neuroangiography and neurosurgery. I would refer you to:
Normal Variants of the Cerebral Circulation at Multidetector CT Angiography
Simon J. Dimmick, BPthy, MBBS • Kenneth C. Faulder, MBBS, FRANZCR
RadioGraphics 2009; 29:1027–1043
How much variation in that vascular anatomy, between patients?