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Variations of the basal vein: identification using three-dimensional CT angiography
1Department of Neurosurgery, Showa University, School of Medicine, 5-8 Hatanodai 1, Shinagawa-ku, Tokyo 142-8666, Japan.
AJNR. American Journal of Neuroradiology
|April 6, 2001
Summary
The basal vein of Rosenthal (BVR) shows significant anatomical variations, with only 55.4% exhibiting typical drainage patterns. Three-dimensional CT angiography is effective for visualizing BVR variations and drainage routes.
Area of Science:
- Neuroanatomy
- Vascular anatomy
- Embryology
Background:
- The basal vein of Rosenthal (BVR) exhibits numerous variations due to its origin from embryonic vein anastomoses.
- Understanding these variations is crucial for neurosurgical and radiological interventions.
Purpose of the Study:
- To evaluate the anatomical variations of the basal vein of Rosenthal (BVR).
- To classify BVR variations based on embryonic development and drainage pathways.
Main Methods:
- Analysis of 500 three-dimensional CT angiograms from 250 patients.
- Utilized voxel transmission and maximum intensity projection (MIP) imaging techniques.
Main Results:
- The BVR drained into the great vein of Galen in 87.8% of cases.
- Typical BVRs with specific anastomoses were found in only 55.4% of subjects.
- Variations included drainage into cavernous sinus, sphenoparietal sinus, and other venous structures.
Conclusions:
- BVR variations can be classified based on five embryonic drainage pathways.
- 3D CT angiography effectively visualizes BVR anatomy and main drainage routes.
- MIP images are essential for detecting hypoplastic BVR variations.