颅内血管畸形的MRI诊断

Intracranial Vascular Malformations: Magnetic Resonance Imaging Diagnosis

报告33例经手术证实的颅内血管畸形,分析颅内血管畸形的MRI表现,并与CT和DSA检查比较。MRI能提供颅内血管畸形出血的证据,显示条索状、蚯蚓状或蜂窝状的信号流空血管,甚至还可显示供血动脉或引流静脉(36.3％)。血管造影阴性的6例,经MRI证实为隐匿性血管畸形,说明MRI对颅内血管畸形的诊断明显优于CT扫描,对隐匿性血管畸形的诊断甚至优于DSA检查。

Thirty-three patients with cerebral vascular malformations were evaluated with CT and MRI. In this group, 12 cases were also studied by angiography. All cases were demonstrated on surgery. Characteristics of the malformations on MR images were analyzed and a comparative evaluation of MRI and CT scan was made. MRI not only provided strong evidence for the diagnosis of hematoma, but also showed streak, lumbricoid or honeycomb vessels which were at regions of signal void. In some cases, MRI could detect the feeding arteries or draining veins (36.3%). In six cases of occult vascular malformation angiography gave false negative results, but MRI found the lesions. MRI was superior to CT scan in the diagnosis of cerebral vascular malformations.