3D TOF MR angiograms.A, Angiogram of the circle of Willis with the complete anterior configuration shows the AcoA (arrow).B, Angiogram of the circle of.

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Presentation transcript:

3D TOF MR angiograms.A, Angiogram of the circle of Willis with the complete anterior configuration shows the AcoA (arrow).B, Angiogram of the circle of Willis with the complete posterior configuration shows the right and left PcoAs (arrows). 3D TOF MR angiograms.A, Angiogram of the circle of Willis with the complete anterior configuration shows the AcoA (arrow).B, Angiogram of the circle of Willis with the complete posterior configuration shows the right and left PcoAs (arrows)‏ Arjan W.J. Hoksbergen et al. AJNR Am J Neuroradiol 2003;24:456-462 ©2003 by American Society of Neuroradiology