MR弥散加权成像在脑膜瘤术前分型及分级诊断中的应用

目的探讨MR弥散加权成像技术对脑膜瘤术前分型及良恶性鉴别的临床应用价值。方法对37例脑膜瘤病人行MR弥散加权成像检查。结果血管瘤型脑膜瘤实质部分的rADC值均数最高,恶性组脑膜瘤的rADC值均数最低。在良性脑膜瘤中,砂砾体型脑膜瘤的rADC值均数最低。瘤周水肿区的rADC值均数间无统计学意义。结论rADC值对脑膜瘤术前分型及良恶性鉴别有所帮助,瘤周水肿区的rADC值对脑膜瘤分型及良恶性鉴别无临床实用价值。

Exploratory development of MR diffusion weighted imaging in diagnosis meningeomas of typing and grading before operation

Objective To evaluate the role of MR Diffusion Weighted Imaging(DWI)in preoperation diagnosis of meningiomas.Methods DWI images was performed in 37 patients with meningiomas followed by conventional imaging.Results The mean rADC values of angioblastic was the highest in the parenchyma of tumor.The mean rADC values of malignant group were the lowest.The mean rADC values of gravelly were the lowest in benign type meningiomas.The difference of mean rADC values between benign and malignant group meningiomas was no statistically significant in the peri-tumor edema.Conclusion rADC values were useful in the preoperative differentiation diagnosis of different types of meningiomas.The rADC values in the peri-tumor edema were useless in the preoperative differentiation diagnosis of different types of meningiomas.