Ikushima I, Korogi Y, Kitajima M, Yamura M, Yamashita Y
Department of Radiology, Miyakonojo Medical Association Hospital, 5822-3 Oiwadacyo, Miyakonojyo 885-0062, Japan.
Eur J Radiol. 2006 Apr;58(1):96-101. doi: 10.1016/j.ejrad.2005.11.011. Epub 2006 Jan 4.
Three-dimensional (3D) contrast-enhanced magnetization-prepared rapid gradient-echo (MP-RAGE) sequence has been reported useful for evaluation of the intracranial venous structures. The purpose of this study is to assess the patterns of the major anastomotic veins on the lateral surface of the cerebrum using MP-RAGE sequence.
MP-RAGE images in consecutive 100 patients (200 sides) were reviewed by two neuroradiologists in consensus to evaluate drainage patterns of the superficial middle cerebral vein (SMCV), the vein of Labbe, and the Trolard vein.
MP-RAGE images clearly depicted the major anastomotic veins and their draining vessel. The dominant vein was the Trolard vein in 12%, the vein of Labbe in 36%, SMCV in 38%, and all three veins in 14%. The vein of Labbe was entered the transverse sinus in 80% and superior petrosal sinus in 4%. Undeveloped type of the vein of Labbe was seen in 16%. The SMCVs were entered the sphenoparietal sinus in 57%, the cavernous sinus in 19%, and the emissary vein in 5%. Basal type of the SMCVs was seen in 3% and undeveloped type in 16%. It was difficult to differentiate the Trolard vein from other cortical veins, if it was not dominant. In the most cases with the dominant Trolard vein, it located at the level of the post central vein.
With MP-RAGE sequence, it is easy to identify the variation of the major anastomotic veins. Such information may be helpful to reduce the risk of damage on these important veins at surgery.
三维（3D）对比增强磁化准备快速梯度回波（MP-RAGE）序列已被报道可用于评估颅内静脉结构。本研究的目的是使用MP-RAGE序列评估大脑外侧表面主要吻合静脉的模式。
由两位神经放射科医生共同回顾连续100例患者（200侧）的MP-RAGE图像，以评估大脑中浅静脉（SMCV）、Labbe静脉和Trolard静脉的引流模式。
MP-RAGE图像清晰地描绘了主要吻合静脉及其引流血管。优势静脉为Trolard静脉的占12%，Labbe静脉的占36%，SMCV的占38%，三条静脉均有的占14%。Labbe静脉汇入横窦的占80%，汇入岩上窦的占4%。Labbe静脉未发育型占16%。SMCV汇入蝶顶窦的占57%，汇入海绵窦的占19%，汇入导静脉的占5%。SMCV基底型占3%，未发育型占16%。如果Trolard静脉不是优势静脉，则很难将其与其他皮质静脉区分开来。在大多数优势Trolard静脉的病例中，它位于中央后静脉水平。
使用MP-RAGE序列，很容易识别主要吻合静脉的变异。这些信息可能有助于降低手术中损伤这些重要静脉的风险。
