MRTA综合扫描技术对血管压迫性面肌痉挛的诊断价值

The Application of MR Tomographic Angiography Comprehensive Scanning Technique in the Diagnosis of Hemifacial Spasm Caused by Vascular Compression

目的:探讨3.0T磁共振断层血管成像(MRTA)各种扫描方法在脑神经血管压迫综合征中的应用,并分析各种方法的优缺点。方法:对50例临床诊断为面肌痉挛的患者,进行t1-vibe-fs、t2-space-p2、3D-TOF FLASH三种序列扫描后,计算各组图像信号噪声比(SNR)和对比噪声比(CNR),并分析比较其图像质量。结果 :t1-vibe-fs、t2-space-p2两种序列图像的SNR与CNR均高于3D-TOF FLASH序列(P均<0.05),t1-vibe-fs序列图像的SNR高于t2-space-p2序列(P<0.05),CNR低于t2-space-p2序列(P<0.05)。t1-vibe-fs、t2-space-p2两种序列的图像质量评分均高于3D-TOF FLASH序列(P均<0.05),t2-space-p2序列的图像质量评分高于t1-vibe-fs序列(P<0.05)。结论:MRTA技术能清楚显示颅神经及责任血管,t1-vibe-fs结合t2-space-p2对颅神经血管压迫综合征有重要价值。

Purpose： To investigate the application of MR tomographic angiography （MRTA） comprehensive scanning technique on cranial neurovascular compression syndrome, and to analyze the advantages and disadvantages of various methods. Methods： MRTA was performed in 50 patients with hemifacial spasm （HFS） . The quality of MRTA images were compared between tl-vibe-fs, t2-space-p2 and 3D-TOF FLASH sequences. After the scanning, the signal to noise ratio （SNR） and contrast to noise ratio （CNR） were calculated, and the image quality was also evaluated. Results： The SNR and CNR of tl-vibe-fs and t2-space-p2 were higher than that of 3D-TOF FLASH （all P〈0.05）. The SNR of tl-vibe-fs was higher than that of t2-space-p2 （P 〈0.05）.The CNR of tl-vibe-fs was lower than that of t2-space-p2 （P 〈 0.05）.The image quality scores of tl-vibe-fs and t2-space-p2 were higher than that of 3D-TOF FLASH （all P 〈 0.05）.The image quality scores of t2-space-p2 was higher than that of tl-vibe-fs （P 〈 0.05）. Conclusions： MRTA may clearly show the relationship of cranial nerves and responsible blood vessels, combined application of t1-vibe-fs and t2-space-p2 sequences are valuable for the diagnosis of cranial neurovascular compression syndrome.