A.阻塞近端蛛網(wǎng)膜下腔呈杯口狀壓跡 B.阻塞近端蛛網(wǎng)膜下腔呈水平狀或鋸齒狀突然中斷 C.部分阻塞時,造影劑呈對稱性分流 D.阻塞遠(yuǎn)端蛛網(wǎng)膜下腔正常 E.阻塞遠(yuǎn)端蛛網(wǎng)膜下腔呈水平狀中斷