摘要
目的研究弥散加权成像(DWI)在鉴别脑脓肿和坏死、囊变脑肿瘤中的诊断价值。方法对27例脑脓肿和33例坏死、囊变脑肿瘤(胶质瘤和转移瘤)行常规MRI和DWI检查。测量感兴趣区(ROI)的表观弥散系数(ADC)值,行统计学分析;DWI与常规MRI比较,计算敏感性、特异性。结果大部分脑脓肿在DWI上为高信号,脑肿瘤的坏死、囊变部分在DWI上为低信号,其间ADC值差异有统计学意义;常规MRI诊断的敏感性及特异性低于DWI诊断的敏感性及特异性。结论DWI和ADC值的测量在诊断脑脓肿和坏死、囊变脑肿瘤病变方面具有重要价值,可以作为常规MRI检查的重要补充。
Objective To investigate the value of diffusion weighted imaging （DWI）on brain abscess and necrotic or cystic brain tumors. Methods 27 cases with brain abscesses and 33 cases with necrotic or cystic brain tumors （gliomas or metastases） were performed conventional MRI and DWI. Apparent diffusion coefficient （ADC） of region of interest （ROI） was measured and statistically tested. Sensitivity and specificity were calculated and compared with conventional MR and DWI. Results Hyperintensity signal was seen on most brain abscesses. All necrotic or cystic brain tumors showed hypointensity signal on DWI. There was statistical significance on ADC of them. The sensitivity and specificity of conventional MRI was lower than that of DWI. Conclusion DWI and ADC were useful in distinguishing brain abscessed from necrotic or cystic brain tumors, which was important in addition to conventional MRI.
出处
《影像诊断与介入放射学》
2009年第1期3-5,共3页
Diagnostic Imaging & Interventional Radiology
关键词
弥散加权成像
脑脓肿
脑肿瘤
Diffusion weighted imaging
Brain abscess
Brain tumor
