摘要
目的:探讨FLAIR序列大脑中动脉高信号征(HSMCA)诊断急性期脑梗死的价值。方法:对55例大脑中动脉供血区急性脑梗死患者进行常规MRI检查及DWI、MRA检查,并将FLAIR序列大脑中动脉高信号征与TOF-MRA、DWI序列高信号病灶及随访检查进行对比。结果:FLAIR序列17例(30.9%)患者发现大脑中动脉M1段高信号征,其中左侧大脑中动脉11例,右侧大脑中动脉6例;合并M2、M3、M4和M5段高信号7例。患者自出现严重自觉症状到进行MRI检查,间隔时间1h到15h不等,平均3.6h。17例HSMCA患者中,8例相应节段大脑中动脉均有严重狭窄或闭塞;38例无HSMCA患者中,12例双侧大脑中动脉有节段性狭窄,严重狭窄或闭塞7例,HSMCA患者较无HSMCA患者病变侧大脑中动脉严重狭窄的数量明显增多,二者之间存在显著性差异(P<0.003)。结论:FLAIR序列上大脑中动脉高信号征可作为诊断急性期脑梗死的早期参考征象。
Objective：To explore the relationship between the hyperintense sign middle cerebral artery （HSMCA） and acute cerebral isehemla. Methods：55 patients were studied with occlusion of MCA. HSMCA on FLAIR images was compared with MR angiography of time of flight （TOF）, hyperintense lesions on diffusion-weighted images （DWI）, and the results of follow-up MR scans. Results：In 17 （30.9%） patients, HSMCA were detected on FLAIR images as early as averaged 3.6 hours （range 1 - 15h） after stroke onset. HSMCA on FLAIR images were detected on M1 of MCA, among which 11 cases of HSMCA were on left MCA, 6 eases on fight MCA, and 7 cases were on M2, M3, M4 and M5 besides M1. In 17 patients with HSMCA, 8 eases had severe stenosis or occlusion in corresponding segements of MCA; in 38 patients without HSMCA, 12 eases had segmental stenosis in MCA, 7 cases with severe stenosis or occlusion. The patients with HSMCA had much more severe stenosis in MCA than teat of patients without HSMAC. There was significant difference （ P 〈 0.003） between them. Conclusion：HSMCA on FLAIR images could be an early sign of occlusion in MCA.
出处
《医学影像学杂志》
2008年第9期976-979,共4页
Journal of Medical Imaging
关键词
大脑中动脉
高信号
急性期
脑梗死
Middle cerebral artery
Hyperintense
Acute stage
Cerebral isehemia
