MR扩散成像在脑脓肿和囊性脑转移瘤鉴别诊断中的价值

目的:探讨磁共振扩散加权成像(DWI)在脑脓肿和囊性脑转移瘤鉴别诊断中的价值。方法:16例单发性颅内占位病变患者,其中脑脓肿6例,囊性脑转移瘤10例,均行MRI检查,包括T1WI、T2WI、T1WI增强及DWI扫描。分别测定瘤内囊性部分和健侧脑脊液的表观弥散系数(ADC)值。结果:脑脓肿组与脑转移瘤组瘤内囊性部分的ADC值比较差异有统计学意义(P<0.05)。结论:瘤内囊性部分ADC值的测定,对脑脓肿和囊性脑转移瘤间的鉴别诊断有重要意义。

Objective: To explore the value of DWI(diffusion-weighted imaging) in differentiation between solitary brain abscesses and Metastatic tumors.Methods: MRI,using conventional and DWI,was performed in 16 patients with solitary intracranial space-occupying lesions,in which there were 6 brain abscesses and 10 metastatic tumors.The apparent diffusion coefficient(ADC) of cystic components of tumors and contralateral normal cerebral spinal fluid(CSF) were measured.Results: Comparing with the brain abscesses group,the ADC value of the cystic components of metastatic tumors in tumors group was statistically significant(P < 0.05).Conclusion: The ADC value of cystic components is valuable to differentiate solitary brain abscesses with metastatic tumors.