磁共振DWI对脑脓肿与坏死囊变性胶质瘤的鉴别诊断价值  

The Value of MR Diffusion Weighted Imaging to Differentiation of Cerebral Abscesses from Necrotic or Cystic Gliomas

作　　者：刘鹏飞[1] 邓贺民[2] 王晓睿[1] 那婧[1] 

机构地区：[1]哈尔滨医科大学附属第一医院磁共振室,黑龙江哈尔滨150001 [2]齐齐哈尔市第一医院神经外科,黑龙江齐齐哈尔161001

出　　处：《中国临床神经外科杂志》2006年第12期711-714,共4页Chinese Journal of Clinical Neurosurgery

摘　　要：目的评价磁共振弥散加权成像(DWI)及表观弥散系数(ADC)值在脑脓肿与坏死囊变性胶质瘤鉴别诊断中的作用。方法8例脑脓肿和15例坏死囊变性胶质瘤,均行常规磁共振T1WI、T2WI和DWI检查。观察病变区信号强度,并分别测量脑脓肿、胶质瘤坏死囊变区、周围水肿、对侧正常脑白质及脑脊液的ADC值。结果DWI上所有脑脓肿均呈高信号,而胶质瘤坏死、囊变部分均呈低信号。脑脓肿与胶质瘤坏死囊变区ADC值之间,脑脓肿周围水肿与胶质瘤周围水肿的ADC值之间均有统计学差异。结论DWI与ADC值测量能有效反映脑脓肿与坏死、囊变性胶质瘤的不同液态性质,对其鉴别诊断有重要作用。Objective To evaluate the roles of magnetic resonance diffusion-weighted imaging （MRDWI） and apparent diffusion coefficient （ADC） value in differentiation of brain abscesses from necrotic or cystic gliomas. Methods The routine MRI and MRDWI examinations before the treatment were performed in 8 patients with cerebral abscess and 15 patients with necrotic or cystic gliomas. The signal intensities of the lesions on MRI and MRDWI were comparatively observed, and ADC values of the abscesses, necrotic or cystic parts of gliomas, surrounding edema area, normal white matters opposite to the lesions and cerebrospinal fluid （CSF） were separately measured. Results On MRDWI, all the brain abscesses manifested marked hyperintensity signals in 8 patients, whereas all the necrotic or cystic gliomas manifested hypointensity signals in 15 patients. The mean ADC values of the abscesses,necrotic or cystic parts of gliomas, and the surrounding edema area were significantly different from each other. Conclusions MR DWI and ADC can effectively reflect the different fluid properties of the abscesses and cystic or necrotic gliomas, and can be used to differentiate brain abscesses from necrotic or cystic gliomas.

关 键 词：磁共振成像 脑脓肿 胶质瘤 弥散加权成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R742.7[医药卫生—诊断学]