MRI高分辨率3D序列检测血管性神经压迫

目的探讨三维稳态进动快速成像序列（3D fast imaging employing steady state acquisation,3D-FIESTA）及三维动态增强序列（3D fat-suppressed spoiled qradient-echo,3D-FSPGR）序列在颅神经血管压迫综合征的影像诊断中的作用。方法利用GE Signa HD MR 1.5T超导磁共振机,采用3D-FIESTA及3D-FSPGR序列,对17例临床怀疑有血管性神经压迫的患者行桥小脑角区扫描,采用多平面重建（MPR）及最小密度投影行后处理。结果3D-FIESTA显示13例,3D-FSPGR序列显示15例血管神经关系密切,其中三叉神经5例,面神经7例,副神经3例;有11例行微血管减压术,经手术证实。结论3D-FIESTA序列结合增强扫描3D-FSPGR序列能很好的显示血管性神经压迫,有助于准确影像诊断。

High Resolution MR Sequence in Detecting Neurovascular Depression

Objective To evaluate the role of 3D fast imaging employing steady state acquisation （3D-FIESTA）and 3D fat-suppressed spoiled qradient-echo （3D-FSPGR） MR sequence in the diagnosis of neurovascular depression syndrome （NDS）. Methods The study was performed on GE 1.5T Signa HD MR system with 3D-FIESTA sequence and 3D- FSPGR sequences. 17 cases with suspected NDS underwent MR scanning in cerebellopontine angle and images were post- processed with multi-planar reconstruction （MPR） and minimum intensity projection （MinIP）. Results 13 cases and 15 cases with suspected NDS were detected in 3D-FIESTA and 3D-FSPGR scanning respectively, among whom 5 cases had trigeminal nerves, 7 cases had facial nerve and 3 cases had accessory nerve depressed by adjacent vessels, 11 cases were proved by microvacular decompression surgery. Conclusion 3D-FIESTA sequences and contrast-enhanced 3D-FSPGR sequences can precisely show the relationship of nerve and vessel for NDS, so it helps for imaging diagnosis of NDS.