磁共振静脉血管造影对颅内静脉窦血栓形成的诊断价值及正常人静脉窦变异情况研究

Diagnostic value of magnetic resonance venography in cerebral venous sinus thrombosis and venous sinus variation of normal people

目的评价MRV与MRI诊断颅内静脉窦血栓形成的一致性,观察正常人MRV表现及其静脉窦变异情况。方法共29例颅内静脉窦血栓形成患者行MRI和MRV检查,计算二者诊断一致性;同时观察11例正常对照者颅内静脉窦在血流和连接方式等方面的变异情况。结果 MRV与MRI诊断颅内静脉窦血栓形成的一致率:3.0T为92.59%(25/27)、1.5T为88.24%(15/17)。正常对照者静脉窦变异主要集中在横窦,11例中双侧横窦显影粗细大致相同5例、右侧横窦较粗5例、左侧横窦较粗1例。结论MRV与MRI诊断颅内静脉窦血栓形成具有较高的一致性,但对于先天性变异无法区分,需结合MRI综合分析。正常人静脉窦变异主要集中在横窦,传统认为右侧横窦可较左侧横窦粗,但根据目前数据也可出现右侧横窦比左侧横窦细的情况。

Objective To evaluate the consistency of MRV and MRI for the diagnosis of cerebralvenous sinus thrombosis（CVST）, and to study MRV performance of normal people and venous sinusvariation performed by MRV.MethodsBoth MRI and MRV examinations were performed in 29 CVSTpatients to explore the diagnostic coincidence rate. Eleven normal controls were collected to recieve MRIand MRV examinations, and the variability of blood flow and connection mode in intracranial venous sinuswas observed.ResultsCoincidence rate was 92.59%（25/27） in the 3.0T, and was 88.24%（15/17） in the1.5T. The major sinus variation of the normal controls was mainly located in the transverse sinus. Among11 normal controls, 5 persons had almost the same thickness of bilateral transverse sinus, 5 had thickerright transverse sinus, and 1 had thicker left transverse sinus.ConclusionsMRV has a high coincidencerate with MRI in the diagnosis of CVST, but it can not distinguish the inherent variability, which can bejudged when combined with MRI scan. Variation in brain venous sinus of normal people is mainlyconcentrated in transverse sinus. Traditional view believes that left transverse sinus can be thinner than theright. However, based on current data, right transverse sinus can be thinner than the left.