摘要
目的:探讨MR弥散加权成像(diffusion-weighted imaging,DWI)技术在诊断急性脑梗死中的价值。方法:分析31例临床确诊为急性脑梗死患者的DWI图像,其中超急性期(小于4小时)3例,急性期(4～24小时)28例,观察和分析DWI图上异常信号的部位、强度和边界,选择并测量病变区表观弥散系数(apparent diffusion coefficient,ADC),并与同层对侧相应正常部位影像进行比较。结果:(1)所有急性脑梗死病灶在DWI均表现为高信号。31例患者共诊断1cm以上急性梗死病灶39个;(2)随着b值的增加,弥散效果越好,梗死显示也越清晰。(3)梗死部位ADC值明显低于对侧相应部位,差异有显著性(P<0.01)。结论:磁共振DWI技术对急性脑梗死病变显示敏感性和准确性高,在脑梗死早期诊断中有很高的价值。
Objective：To explore the value of DWI in the diagnosis of acute cerebral infarction. Methods：Thirty-one Patients with acute cerebral infarction （hyperacute cerebral infarction in 3 cases and acute cerebral infarction in 28 eases） were examined with 3T MRI DW sequence.The imaging was studied, the ADC value was calculated and compared with contralateral normal brain tissue. Results： （1） Thirty-nine acute cerebral infarction lesions were found in 31 patients.AU ischernic lesions were demonstrated with hyperintensity on DWI.（2）The higher the b value,the better the effects of diffusion and imaging.（3）The value of ADC of the lesions decreased than that of the eontralateral normal area. Conclusion： DWI is of a most sensitive and accurate method in the diagnosis of acute cerebral infarction.
出处
《现代医药卫生》
2008年第11期1596-1597,共2页
Journal of Modern Medicine & Health
关键词
弥散加权成像
急性脑梗死
磁共振成像
Diffusion-weighted imaging
Acute cerebral infarction
Magnetic resonance imaging
