颅内静脉窦血栓形成的早期影像学特征

目的探讨颅内静脉窦血栓形成（CVST）的早期头部CT、MRI及磁共振静脉成像（MRV）影像学特征，为诊断CVST的影像学检查的选择提供依据。方法回顾性分析2009年1月-2013年1月经临床和影像学检查确诊的46例CVST患者的临床资料及头部CT、MRI、MRV影像学特征。结果头部CT显示CVST的直接征象15例（32．6％），间接征象8例（17．4％）；MRI显示CVST的表现17例（68．0％）；MRI＋MRV检查的阳性率为87．5％，MRI＋MRV与DSA的符合率为84．6％。结论根据临床病史高度怀疑CVST患者的头颅CT可作为筛查手段，MRI合并MRV检查对明确CVST的诊断有较高价值。

Characteristics of Images for Early Cerebral Venous Sinus Thrombosis

Objective To explore the features of images by CT, MRI, and MRV for early cranial venous sinus thrombosis （CVST） to provide the diagnostic evidence for choosing an optimal imaging examination. Methods The clinical data （imaging features of CT, MRI, and MRV） of 46 patients with CVST diagnosed between January 2009 and January 2013 were retrospectively analyzed. Results Brain CT showed the direct signs of CVST in 15 cases （32.6%）, and indirect signs of CVST in 8 （17.4%）. MRI showed the signs of CVST in 17 cases （68.0%）; the diagnostic positive rate of MR venography （MRV） combined with MRI was 87.5%, 84.6% of which was in line with that of digital subtraction angiography. Conclusions CT can be used as screening tool for those highly suspect CVST cases. MRI combined with MRV show great diagnostic value for CVST.