MRI和CT联合诊断33例脑裂畸形的价值及影像特征分析

目的探讨核磁共振成像(MRI)和断层扫描(CT)联合诊断脑裂畸形的价值及影像学特征。方法回顾性分析我院收治的33例脑裂畸形患者的临床资料,均行CT和MRI检查,分析CT、MRI的影像学特征及联合诊断的临床价值。结果33例脑裂畸形患者中,裂隙42个,单侧裂隙24例,双侧裂隙9例;融合型15例,分离型16例,左侧融合型、右侧分离型2例;CT和MRI示大脑半球的横行裂隙,边缘衬有灰质,侧脑室扩大30例,脑室无明显扩大3例;侧脑室呈局限性幕状突起29例;31例伴有脑部发育异常,透明隔缺如18例,灰质异位15例,胼胝体发育异常5例,蛛网膜囊肿3例,多小脑回畸形1例,巨脑回畸形1例。结论CT和MRI均能清晰显示脑裂畸形的影像学特征,对于较为隐匿的脑裂畸形CT容易漏诊,联合MRI诊断的准确性更高。

Value and Imaging Features of MRI Combined with CT in Diagnosing of 33 Cases of Schizencephaly

Objective To explore the value and imaging features of magnetic resonance imaging(MRI) combined with computed tomography(CT) in the diagnosis of 33 cases of schizencephaly. Methods The clinical data of 33 patients with schizencephaly admitted to our hospital were retrospectively analyzed. And the patients were given CT and MRI examinations. The imaging features of CT and MRI and the clinical value of combined diagnosis were analyzed. Results Among 33 patients with schizencephaly, there were 42 clefts, and 24 cases with unilateral cleft and 9 cases with bilateral cleft. There were 15 cases with fusion type, 16 cases with segregation type, and 2 cases with type of left fusion and right segregation. CT and MRI showed that there was transverse cleft in cerebral hemisphere and gray matter in marginal lining, and there were 30 cases with lateral ventricle enlargement and 3 cases without obvious ventricle enlargement. 29 cases were with localized tentiform protrusions in the lateral ventricle. 31 cases were with brain developmental abnormalities, and 18 cases with lack of septum pellucidum, 15 cases with gray matter heterotopia, 5 cases with abnormal corpus callosum, 3 cases with arachnoid cyst, 1 case with polycerebellar gyrus malformation and 1 case with pachygyria. Conclusion Both CT and MRI can clearly show the imaging features of schizencephaly. For the more insidious schizencephaly, CT is easy to have missed diagnosis, and CT combined with MRI can have high accuracy.