颅内动脉粥样硬化的影像学检查管腔狭窄与侧枝灌注（英文）.ppt

* * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… * * The etiology is unknown. There have been a hot debate over if it is congenital or acquired. There are several facts which support congenital theory. Also there are some facts support acquired theory. Now we know, at least, Moyamoya disease may be systemic vascular disease. As regards the etiology of moyamoya disease, there is genetical susceptability, and some enviromental factor such as infection can modulate the etiology. * LP vs willisian, unusual, not elsewhere in body * LP vs willisian, unusual, not elsewhere in body * * Women better, IA-all 3 * Selected aspects and new concepts, provocative… * Imaging many correlates * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… * * * * * * * * * * * * * * * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… * * Selected aspects and new concepts, provocative… * * Selected aspects and new concepts, provocative… * Selected aspects and new concepts, provocative… 50% of cases, stronger p values * 57 VA good coll, stroke * * Women better, IA-all 3 * Selected aspects and new concepts, provocative… Plaque stability USPIO Vessel wall imaging T1-weighted post-contrast images GRE and phase imaging GRE = background magnitude + phase = + FVH Slow collateral flow distal to severe lesions Relatively rare Asymptomatic stenoses WASID, 18.9% (n=14/74) on 4-vessel cerebral angiography and 27.3% (n=65/238) on MRA During a mean follow-up period of 1.8 years, no ischemic strokes were attributable to an AIS on angi