磁共振脑白质成像诊断脑膜瘤的临床价值探讨

Brain white-matter imaging on MRI: clinical value of diagnosis of meningiomas

目的探讨磁共振脑白质成像对脑膜瘤的诊断价值。方法使用Philips 1.5 T MR成像仪先行常规T1WI、T2WI以及DW成像对脑膜瘤33例扫描观察,在上述扫描完成后,加磁共振脑白质成像(WM-only)序列(平扫或/增强)及T1WI增强对上述占位病变进行综合分析,得出脑膜瘤的初步影像诊断,再与病理结果对照。结果常规T1WI、T2WI对颅内33例脑膜瘤的诊断与病理结果相符达20例,符合率60.60%;DW成像结合T1WI、T2WI相符23例,符合率69.70%;WM-only结合T1WI、T2WI、DWI相符30例,符合率达90.91%。结论磁共振脑白质成像通过观察脑膜瘤信号、边界、边缘、以及瘤周水肿情况,结合常规MRI能更好诊断脑膜瘤。磁共振脑白质成像可观察脑膜瘤对周围脑组织尤其是脑灰白质浸润情况,判定与鉴别脑膜瘤。磁共振脑白质成像结合T1WI、T2WI和DWI对脑膜瘤具有一定的诊断意义。

Objective To investigate the diagnostic value of MIR brain white-matter imaging for meningiomas.Methods Thirty-three patients with meningiomas were scanned by conventional T1 WI,T2WI and DW imaging with Philips Intera 1. 5 T nova.After the scan is completed,the white-matter（ WM-only） imaging（ plain or enhanced） and DTPA enhanced T1 W imaging were performed to comprehensively analyze to obtain an initial diagnosis of meningiomas. Then,the results were compared with pathological findings. Results The conventional T1 WI and T2 WI diagnosed 20 patients with meningiomas.The coincidence rate with pathological diagnosis was60. 60%. The DWI combined with T1 WI and T2 WI diagnosed 23 patients with meningiomas.The coincidence rate with pathological diagnosis was 69. 70%.The WM-only imaging combined with T1 WI,T2WI and DWI diagnosed 30 patients with meningiomas. The coincidence rate with pathological diagnosis was 90. 91%.Conclusion It can better diagnose meningiomas that the brain white-matter imaging combine with conventional MRI since brain white-matter imaging can observe the signal,boundary,edge of the meningiomas and edema around the tumor.The brain white-matter imaging can observe the surrounding brain tissue and infiltration of brain white-matter,determine and differentiate meningiomas.Therefore,the brain white-matter imaging combined with T1 WI,T2WI and DWI has certainly diagnostic significance for meningiomas.