Objective   To investigate the anatomic features of superior sagittal sinus and its tributaries by volume CT digital subtraction angiography (VCTDSA) and to evaluate their clinical significance.    Methods   VCTDSA data that matches our research inclusion criteria of 102 patients with cephalocervical and cephalic scanning in our hospital from February 2007 to December 2008 were analyzed. The morphology of original point

output forms and the diameter of superior sagittal sinus were studied. The number of tributaries veins

the anastomosis of superior sagittal sinus with other sinuses were observed.    Results   The superior sagittal sinus

accounting for 40.2%

had dead end original point

and of 59.8% was converged by veins. The output branching was most as superior sagittal sinus lateralization and straight-sinus type (48.0%

49/102)

followed by double branching type (36.3%

37/102) and confluence sinus type (12.7%

13/102). The section of superior sagittal sinus was triangle at most (79.4%

81/102). Trolard anastomosis in 106

Labbe anastomosis in 155

and anastomosis between superior sagittal sinus and falciform sinus

straight sinus through cerebral falx vein in 25 were found.    Conclusion   VCTDSA is an useful method to display the anatomic features of superior sagittal sinus and its tributaries. The morphology of vessels is demonstrated completely

clearly and in different views. And it may be useful for diagnosis and operation of the superior sagittal sinus and its tributaries in clinical medicine.