Effects of XXXX on intracranial venous circulation assessed by the virtual reality technology.

@entity1 @entity5 @entity12432 @entity4254 @entity1504 @entity1653 @entity2473 @entity2458 @entity50
OBJECTIVE: This study is to investigate the compensatory intracranial venous pathways in @entity1653 ( @entity1653 ) @entity1 by virtual reality technology. METHODS: A total of 48 @entity1653 @entity1 ( @entity5 group) and 20 @entity1 with @entity4254 and hemifacial @entity2473 but without @entity1504 (control group) were enrolled. All @entity1 underwent 3D CE-MRV examination. The 3D reconstructed images by virtual reality technology were used for assessment of diameter and number of intracranial veins, @entity5 location, @entity50 degree and collateral circulation formation. RESULTS: Diameter of bridging veins in posterior 1/3 superior sagittal sinus (SSS) in @entity5 group was significantly smaller than that of the control group (P < 0.05). For @entity5 located in mid 1/3 SSS, diameter of bridging veins and vein of Labb   (VL) in posterior 1/3 SSS decreased significantly (P < 0.05). For @entity5 located in posterior 1/3 SSS, bridging vein number and @entity2458 ( @entity2458 ) diameter significantly decreased while superficial Sylvian vein ( @entity12432 ) diameter increased significantly (P < 0.05). Compared with @entity5 in posterior 1/3 SSS subgroup, number of bridging veins in the @entity5 in mid 1/3 SSS subgroup increased significantly (P < 0.05). Compared with control group, only the bridging vein number in anterior 1/3 SSS segment in invasion Type 3-4 @entity5 subgroup decreased significantly (P < 0.05). Diameter of @entity2458 and bridging veins in posterior 1/3 SSS segment in sinus invasion Type 5-6 @entity5 subgroup decreased significantly (P < 0.05). Compared with control group, only the diameter of VL and @entity2458 of collateral circulation Grade 1 @entity5 subgroup decreased significantly (P < 0.05) while in Grade 3 @entity5 subgroup, @entity2458 diameter decreased and @entity12432 diameter increased significantly (P < 0.05). CONCLUSIONS: The intracranial blood flow is mainly drained through @entity12432 drainage after SSS occlusion by @entity1653 .
