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Inferior sagittal sinus: magnetic resonance imaging study.
Satoshi Tsutsumi1, Hideo Ono2, Hisato Ishii3
1Department of Neurological Surgery, Juntendo University Urayasu Hospital, 2-1-1 Tomioka, Urayasu, Chiba, 279-0021, Japan. shotaro@juntendo-urayasu.jp.
Surgical and Radiologic Anatomy : SRA
|February 7, 2021
Summary
The inferior sagittal sinus (ISS) is a consistent venous structure with variable anatomy, potentially aiding venous drainage. Thin-slice MRI effectively visualizes the ISS and its variations.
Area of Science:
- Neuroimaging
- Vascular Anatomy
- Medical Imaging
Background:
- The inferior sagittal sinus (ISS) has not been previously studied using neuroimaging techniques.
- Understanding venous anatomy is crucial for neurological procedures and diagnosis.
Purpose of the Study:
- To characterize the inferior sagittal sinus (ISS) using magnetic resonance imaging (MRI).
- To explore the anatomical variations and features of the ISS.
Main Methods:
- Thin-sliced, contrast-enhanced MRI was performed on 77 patients with intact cerebral hemispheres.
- Maximum intensity projection (MIP) imaging was utilized to visualize the 3D architecture.
Main Results:
- The ISS was visualized in 97% of patients as a linear structure with consistent diameter.
- Three ISS types were identified, with the underdeveloped type being most common (47%).
- Variability in ISS course and adjacent falx cerebri fenestrations (22%) were observed.
Conclusions:
- The ISS is a constant venous structure with significant morphological variability.
- It may serve as an accessory venous drainage pathway.
- Thin-slice, contrast-enhanced sagittal MRI with MIP is effective for ISS evaluation.
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