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. 2016 Oct;37(10):1774–1780. doi: 10.3174/ajnr.A4803

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© 2016 by American Journal of Neuroradiology

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Fig 1. — Comparison of the 2 CTA protocols for detecting an aneurysm in the posterior communicating artery. A and B, An 80-kVp cerebral CTA with 30 mL of contrast agent in a 49-year-old woman. A volume-rendered digital subtraction CTA image (A) shows an aneurysm in the left posterior communicating artery (red arrow), which is confirmed by 3D-DSA (B). C and D, A 120-kVp cerebral CTA with 60 mL of contrast agent in a 66-year-old woman. C, Volume-rendered digital subtraction CTA image (C) shows an aneurysm in the right posterior communicating artery (red arrow), which is confirmed by 2D-DSA (D).