摘要
目的观察脑膜瘤在磁共振成像(MRI)动态增强与DWI序列中的表现,提高良恶性脑膜瘤鉴别的准确率。方法回顾性分析经桂林医学院附属医院病理证实各级(Ⅰ级、Ⅱ级和Ⅲ级)脑膜瘤MRI数据,总结各级脑膜瘤的增强方式、水肿范围情况,以及对比分析各级脑膜瘤的MRI的动态增强灌注参数和表现扩散系数(ADC)值。结果 30例脑膜瘤位于大脑镰旁,27例脑膜瘤位于矢状窦旁,10例脑膜瘤位于桥小脑角区和6例脑膜瘤位于其他部位。Ⅰ级脑膜瘤与Ⅲ级脑膜瘤的ADC值的差异具有统计学意义[(1.253±0.123)×10^(-3) mm^2/s vs.(0.891±0.103)×10^(-3) mm^2/s,P<0.05]。Ⅰ级脑膜瘤的相对血流量和相对血容量均明显低于Ⅲ级脑膜瘤(P<0.05)。结论 MRI动态增强结合DWI可准确鉴别Ⅰ级脑膜瘤和Ⅲ级脑膜瘤,对表现不具有特征性的脑膜瘤者在术前评估其分级时要适当的向更高级考虑。
Objective To explore the performance of meningiomas in MRI dynamic enhancement and DWI sequence,and to improve the accuracy of differential diagnosis of benign and malignant meningiomas.Methods Meningioma MRI data,which were pathology proved by the Guilin medical college affiliated hospital at different levels(Ⅰ,Ⅱ andⅢ),were retrospectively analyzed.The enhancement of meningiomas at all levels and the extent of edema were summarized,at the meantime the dynamic enhancement perfusion parameters and ADC values of meningioma MRI meningioma were contrastively analyzed.Results There were 30 cases of meningioma located in the brain falcus,27 cases of meningioma located in the sagittal sinus,10 cases of meningioma located in the cerebellopontine angle and 6cases of meningioma located in other parts.The difference of ADC value between gradeⅠ meningiomas and gradeⅢ meningiomas was statistically significant different[(1.253±0.123)×10^-3 mm^2/s vs.(0.891±0.103)×10^-3mm^2/s,P〈0.05].The relative blood flow(rCBF)and relative blood volume(rCBV)of gradeⅠ meningiomas were significantly lower than those of gradeⅢ meningiomas(P〈0.05).Conclusion MRI dynamic enhancement combined with DWI can accurately identify gradeⅠ meningiomas and gradeⅢ meningiomas,and it is necessary that the assessment of its classification should be appropriately considered to the higher level for patients who do not have a characteristic manifestation of meningioma in the preoperative.
出处
《重庆医学》
CAS
北大核心
2017年第15期2078-2079,2082,共3页
Chongqing medicine
关键词
磁共振成像
脑膜瘤
信号处理
计算机辅助
脑膜瘤分级
动态增强
脑灌注参数
magnetic resonance imaging
meningioma
signal processing
computer aided
meningioma grading
dynamic enhancement
cerebral perfusion parameters