摘要
目的 :探讨DWI和ADC图诊断超急性和急性脑梗塞的价值。材料和方法 :14例脑梗塞患者 (超急性期 6例 ,急性期 8例 )采用 1.5TMR机进行扫描 ,对DWI、ADC图及常规T1WI、T2WI进行对比研究分析。结果 :超急性和急性脑梗塞DWI均表现为高信号 ,ADC图均表现为低信号 ,DWI对病变显示达 10 0 %。 6例超急性期脑梗塞患者仅DWI可显示病变而常规T1WI、T2WI无任何相应的异常发现。全部病灶ADC值均低于其相对应的正常脑组织。结论 :DWI对急性脑梗塞诊断敏感、准确 。
Purpose: To evaluate the diagnostic value of DWI and ADC map in hyperacute and acute cerebral infarction. Materials and Methods: 14 patients with cerebral infarction(hyperacute infarction in 6 cases and acute infarction in 8 cases) were examined on a 1.5T MR scanner. The DWI and ADC maps were analyzed and compared with routine T1WI and T2WI. Results: Both the hyperacute and acute cerebral infarction lesions appeared as hyperintense on DWI,and hypointense on ADC map. The detection rate of DWI was 100%.The 6 patients with hyperacute cerebral infarction were only revealed on DWI while no definite abnormalities could be found on conventional T1WI or T2WI.The ADC values of all the infarction lesions were significantly lower than those of the contralateral corresponding normal regions(paired t test,P<0.001). Conclusion: DWI can not only sensitively and accurately detect acute cerebral infarction, but also do the quantitative analysis at the same time.
出处
《中国医学影像学杂志》
CSCD
2004年第5期338-340,共3页
Chinese Journal of Medical Imaging
关键词
扩散加权成像
诊断
超急性脑梗塞
急性脑梗塞
磁共振成像
acute cerebral infarction
diffusion-weighted imaging
apparent diffusion coefficient map
