研究单位：[1]Capital Medical University[2]Xuanwu hospital,Capital Medical University Beijin,XI Cheng District,China,100053
研究目的：
The anatomical characteristics of veins and venous sinus result in great differences between cerebral venous system diseases and cerebral artery diseases in etiology, pathophysiology and clinical features.Therefore, understanding the anatomy and variation of normal venous sinuses is essential to identify the intracranial venous lesions.
