Dormont D, Anxionnat R, Evrard S, Louaille C, Chiras J, Marsault C
Département de Neuroradiologie, Groupe Hospitalier Pitié-Salpêtrière, Paris.
J Neuroradiol. 1994 Apr;21(2):81-99.
Fifty-three patients with cerebral venous thrombosis (CVT) were explored by MRI. Three types of signal abnormalities were observed in thrombosed sinuses: 1) isosignal on T1-weighted sequence and low-intensity signal on T2-weighted sequence (early stage); 2) high-intensity signal on T1-and T2-weighted sequences (intermediate stage); 3) isosignal on T1-weighted sequence and high-intensity signal on T2-weighted sequence (late stage). Signal abnormalities in dural sinuses enabling CVT to be diagnosed were absent in 2 out of 53 cases. Twenty-six out of 53 patients had venous infarction. These lesions were haemorrhagic in 20 cases. MRI made it possible to follow the course of CVT in 15 cases, showing partial or complete recanalization of the occluded sinuses in 14 cases. Our study confirmed that MRI is an excellent non-invasive method to explore CVT. It diagnoses the venous thrombosis, studies parenchymal lesions and follows the course of CVT under treatment. However, MRI is less sensitive than arteriography, particularly in cases of CVT involving only the cortical veins.
对53例脑静脉血栓形成（CVT）患者进行了磁共振成像（MRI）检查。在血栓形成的静脉窦中观察到三种类型的信号异常：1）T1加权序列上等信号，T2加权序列上低强度信号（早期）；2）T1和T2加权序列上高强度信号（中期）；3）T1加权序列上等信号，T2加权序列上高强度信号（晚期）。53例中有2例硬脑膜窦无信号异常，无法据此诊断CVT。53例患者中有26例发生静脉梗死。这些病变中有20例为出血性。MRI能够追踪15例CVT的病程，其中14例显示闭塞静脉窦部分或完全再通。我们的研究证实，MRI是一种用于检查CVT的出色无创方法。它可诊断静脉血栓形成，研究实质病变，并追踪治疗中的CVT病程。然而，MRI的敏感性低于动脉造影，尤其是在仅累及皮质静脉的CVT病例中。
