脑静脉窦血栓形成的CT及MRI诊断分析

目的分析运用CT及MRI诊断脑静脉窦血栓形成价值,探讨其临床适用性。方法选择从2009年5月-2012年11月于我院经临床确诊的32例脑静脉窦血栓患者的CT、MRI影像学资料进行回顾性分析。观察两种检查方法的诊断情况。结果脑静脉窦血栓发病在7d内的患者,CT检查的阳性率为52.38%,发病12d内的阳性为72.73%,总阳性率达59.38%。其中血栓位于直窦和下矢状窦6例,上矢状窦11例,累及横窦-乙状窦4例,累及脑深部大静脉及皮质引流静脉4例;其他部位7例;19例急性患者的CT平扫可见CVST患者静脉窦内条带状或三角形高密度影,结论诊断为脑水肿征象,脑梗死或出血性梗死。CVST患者MR检查,阳性检出率为97.14%,典型患者可见脑静脉窦内异常等信号或高信号影,流空效应消失,结论诊断为脑水肿征象。结论颅脑CT平扫是诊断急性CVST的简单、有效的方法,可以作为一种广泛的筛查方法;而对于亚急性以及慢性CVST患者,MRI可以显示较为特征性表现,对于诊断CVST价值高,在临床上可斟酌应用。

CT and MRI diagnosis of cerebral venous sinus thrombosis formation

Objective ] Analysis CT and MRI diagnosis of cerebral venous sinus thrombosis formation. Methods ] A retrospective analysis of 35 patients with cerebral venous sinus thrombosis CT and MRI imaging data. Results ] The incidence of cerebral venous sinus thrombosis in 7d patients with positive CT examination was 52.38%, 72.73% positive incidence 12d, the total positive rate was 54.29%.And located straight sinus and inferior sagittal sinus, superior sagittal sinus 11 cases, involving the transverse sinus -sigmoid sinus four cases, and four cases involving large vein of deep brain and cortical venous drainage; other parts of the seven cases; 19 cases of acute CT scan, the visible CVST patients with sinus banded or triangular high density, conclusions diagnosis for signs of cerebral edema, cerebral infarction or hemorrhagic infarction.CVST patients with MR imaging, the positive rate of 97.14%, typical seen in patients with cerebral venous sinus thrombosis sinus abnormal signal or high signal flow void disappear conclusion diagnosed with signs of cerebral edema. Conclusion ] Brain CT scan is effective method in the diagnosis of acute CVST ,for subacute and chronic CVST patients, MRI is a high value for diagnosis.