磁共振静脉系血管成像对颅内静脉血栓的诊断价值

目的探讨磁共振脑静脉系血管成像(MR venography, 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20例健康志愿者和20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100%.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.

MR venography in diagnosing intracranial venous sinus thrombosis

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.