Whole-Brain CT Perfusion and CT Angiography Assessment of Moyamoya Disease before and after Surgical Revascularization: Preliminary Study with 256-Slice CT
Figure 2
CT Angiography (CTA) images in frontal projection before and after bypass in Moyamoya disease.
(A) The preoperative volumetric CTA acquired in the arterial phase of whole-brain CT perfusion (CTP) shows the left internal carotid artery (ICA) is occluded in the supraclinoid portion, and “Moyamoya vessels”(arrow) can be seen in the cerebral base. The right supraclinoid ICA and the proximal anterior cerebral artery (ACA) and middle cerebral artery (MCA) are markedly stenosed. (B) The arrows indicate the left-side direct graft patency with collateral vessels from the left external carotid artery to the MCA territory on the postoperative volumetric CTA acquired in the arterial phase of whole-brain CTP.