摘要
目的:探讨磁共振弥散加权对脑干、小脑局灶性急性梗塞的诊断与临床价值。材料与方法:对我院在2011年5月至2014年5月收治的126例脑干、小脑局灶性急性梗塞患者,行磁共振常规T_1WI、T_2WI、水抑制序列(FLAIR)和弥散加权扫描(DWI)检查,比较分析同一病变在T_1WI、T_2WI、FLAIR和DWI图像的表现及诊断阳性率。结果:DWI对超急性期、急性期梗塞的诊断阳性率显著高于常规MRI,其诊断阳性率差异具有统计学意义(均P<0.01);此外,梗塞病灶在DWI像上均可见局灶性明显高信号,在ADC像可见低信号;而同一病灶在T_1WI像未见明显异常,T_2WI像隐约可见高信号,FLAIR像隐约间略高信号。结论:磁共振弥散加权能够更快速、准确的诊断出脑干、小脑局灶性急性梗塞,特异性和敏感性高,明显优于常规MRI,值得在临床推广使用。
Purpose： To explore the clinical value of diffusion - weighted imaging （DWI） in the diagnosis of focal cerebral infarction in brainstem and cerebellar. Materials and Methods： 126 patients with focal cerebral infarction in brain- stem and cerebellar who got medical treatment in our hospital were scanned using conventional MRI Tl WI, T2 WI, FLAIR and DWI, then comparative analysis the images of MRI T1WI, T2 WI, FLAIR and DWI and their diagnostic certainty. Results： The positive rate through DWI diagnosis was significantly higher than that of in routine MRI for hyperacute and chronic focal cerebral infarction in brainstem and cerebellar, the positive rate were significantly difference （P 〈 0. 01 ） ; Furthermore, cere- bral infarction all showed local high intensity on DWI mapping, low intensity on ADC mapping, but there was no abnormal sign on T1WI mapping, slightly high intensity on T2WI mapping, and visible slightly high intensity on FLAIR mapping. Conclu- sion ： DWI is highly accurate and fast in the diagnosis of focal cerebral infarction in brainstem and cerebellar and is superior to conventional MRI, worth of clinical use.
出处
《现代医用影像学》
2015年第2期220-222,226,共4页
Modern Medical Imageology
关键词
急性脑梗塞
磁共振弥散加权成像
诊断
临床价值
Acute cerebral infarction
Diffusion -weighted imaging
Diagnosis
Clinical value
