DWI在颅内囊性病变诊断中的应用价值  

The value of MR diffusion-weighted imaging in intracranial cystic lesions

作　　者：张崇杰[1] 张辉[2] 

机构地区：[1]山西医科大学,044000 [2]山西医科大学附属第一临床医院

出　　处：《中国医学创新》2010年第15期132-134,共3页Medical Innovation of China

摘　　要：目的探讨MR弥散加权成像(DWI)在诊断颅内囊性病变中的价值。方法回顾性分析69例经手术病理或临床随访证实的颅内囊性病变DWI信号特征,定量测量不同类型病变囊变区的ADC值,进行统计学分析。结果 DWI上15例脑脓肿和8例表皮样囊肿均呈高信号;8例蛛网膜囊肿均为低信号;38例脑肿瘤患者中除3例胶质瘤呈高信号外,其余均为低信号。脑脓肿与脑肿瘤的囊变坏死区ADC值比较,差异有统计学意义(P<0.01);胶质瘤与听神经瘤、转移瘤与听神经瘤的囊变坏死区ADC值比较,差异均无统计学意义(P>0.05);而蛛网膜囊肿与表皮样囊肿ADC值比较,二者之间的差异有统计学意义(P<0.01)。结论 DWI及ADC值对鉴别脑脓肿和囊性或坏死性及肿瘤有重要价值,对鉴别蛛网膜囊肿和表皮样囊肿有明显优势,DWI表现为低信号的颅内囊性病变可除外脑脓肿和表皮样囊肿。Objective To investigate the value of MR diffusion -weighted imaging （DWI） in the diagnosis and differentiation of intraeranial cystic lesions. Methods Retrospective analysis of 69 eases DWI signal characteristics of intraeranial cystic lesions by surgery, pathology or clinical follow - up, quantitative measurement of the apparent diffusion coefficient （ADC） values in the cystic areas of the lesion to Statistical analysis. Results Hight signal were observed on the whole 15 eases of brain abscess and 8 eases of epidermoid cysts. 8 eases of araehnoid eysts were low signal. 38 eases of brain tumors were low signalIn addition to 3 eases of patients with glioma showed high signal. Comparing the ADC valuers of brain abscess with brain tumors ,the difference hade statistically significant （ P 〈 0.01 ） ; Comparing the ADC valuers of glioma and metastatic tumors, acoustic neuroma,There was no statistically significant difference （P 〉 0.05 ） ; However, compare the ADC values of araehnoid cyst and epidermoid cyst, the difference between the two was statistically significant （ P 〈 0.01 ）. Conclusion DWI and ADC values in differentiating brain abscess and cystic or necrotic and tumor has an important value, there are obvious advantages in differentiating araehnoid cyst and epidermoid cyst, DWI showed low signal of intraeranial cystic lesions of brain abscess may be the exception.

关 键 词：磁共振成像 弥散 脑脓肿 脑肿瘤 表皮样囊肿 蛛网膜囊肿 

分 类 号：R741[医药卫生—神经病学与精神病学]