磁共振静脉系血管成像对颅内静脉血栓的诊断价值

MR venography in diagnosing intracranial venous sinus thrombosis

目的 探讨磁共振脑静脉系血管成像 (MRvenography ,MRV)的技术方法和扫描方案 ,评价其对静脉血栓的诊断价值及临床意义。方法 对 2 0例健康志愿者和 2 0例临床或MRI疑有静脉系疾病的患者行MRV成像 ,观察脑静脉系在MRV中的显示情况及脑静脉血栓在MRV中的表现形式。结果 CE MRA静脉系成像对 13例颅内静脉窦血栓形成 (CVST)及 7例颅内肿瘤累及静脉系的阳性显示率为 10 0 %。 2D PCA及 2D TOF MRA对细小引流静脉显示欠佳 ,且 2D TOF MRA对复杂区域内静脉血管亦显示欠佳。结论 3D CE MRA结合 2D PCA及 2D TOF MRA静脉成像技术为脑静脉系最佳成像方案。

Objective To investigate the technique methods and optimal sequences of intracranial MR venography (MRV),and to evaluate the MRV in diagnosing intracranial venous system and its clinical application. Methods MRV imaging was performed in 20 healthy subjects and 20 patients with cranial venous sinus thrombosis (CVST) or intracranial tumor involved in venous sinus by 2D-TOF-MRA, 2D-PCA and 3D-CE-MRA. MRV imaging results were studied and the optimal sequences of intracranial venous system in MRV were defined. Results Of 20 patients, 13 cases with CVST and 7 cases with intracranial tumor involved in venous sinus were demonstrated by 3D-CE-MRA, and were confirmed operatively and pathologically. The positive showing rate was 100%. Visualization of the complicated region and minor venous was better with 3D-CE-MRA than with 2D-PCA and 2D-TOF-MRA. Conclusion The MR venography with 3D-CE-MRA combined with 2D-PCA and 2D-TOF-MRA are optimal sequences in the intracranial venous system. MRV plays an important role in making preoperative evaluation and in guiding clinical management.