标题：优化MRI T2-3D-SPACE的序列成像在外周神经扫描中的应用

      作者：李伟峰，梁长松，陈泽文，陈钦龙，马超进    江门市新会区人民医院医学影像科，广东 江门 529100

      卷次： 2021年32卷13期

      【摘要】 目的 研究优化核磁共振成像(MRI) T2-三维快速自旋回波序列(T2-3D-SPACE)的序列成像在外周神经扫描中的应用效果。方法 选择江门市新会区人民医院2019年7月至2020年12月收治的42例单侧臂丛神经病变患者，按照随机数表法均分A组、B组和 C组，各 14例，分别接受 T2-3D-SPACE常规平扫、增强扫描、优化T2-3D-SPACE序列扫描。对比三种方式成像的图像质量评分、图像背景抑制评分、神经干对比噪声比(CNR)及信噪比(SNR)，以及对臂丛神经锁骨上下段的显示情况。结果 A组患者的图像质量评分为(3.45±0.42)分，明显低于B组的(3.78±0.31)分和C组的(3.81±0.29)分，差异有统计学意义(P<0.05)；A组患者的图像背景抑制评分为(3.01±0.33)分，明显高于B组的(2.27±0.21)分和C组的(2.61±0.28)分，而C组的图像背景抑制评分又明显高于B组，差异均有统计学意义(P<0.05)；A组患者的 SNR值及CNR值分别为(14.88±1.22)、(18.13±1.68)，明显低于B组的(16.75±1.67)、(19.44±1.39)和C组的(17.29±1.41)、(19.05±1.53)，差异均有统计学意义(P<0.05)；A组患者的锁骨上段和下段显示率分别为 42.86%、35.71%，明显低于B组的 92.86%、85.71%和C组的 85.71%及 78.57%，差异均有统计学意义(P<0.05)。结论 优化MRI T2-3D-SPACE的序列成像与常规增强扫描T2-3D-SPACE均可清晰显示臂丛神经，但优化MRI T2-3D-SPACE序列无需注射对比剂，更适用于对比剂禁忌证患者。
      【关键词】 臂丛神经；核磁共振成像；T2-三维快速自旋回波序列；图像质量；对比噪声比；信噪比
      【中图分类号】 R445 【文献标识码】 A 【文章编号】 1003—6350（2021）13—1709—05

Application of optimized MRI T2-3D-SPACE sequence imaging in peripheral nerve scanning.
LI Wei-feng, LIANGChang-song, CHEN Ze-wen, CHEN Qin-long, MA Chao-jin. Department of Medical Imaging, People's Hospital of XinhuiDistrict, Jiangmen 529100, Guangdong, CHINA
【Abstract】 Objective To study and optimize the application effect of T2-3D-SPACE sequence imaging of mag-netic resonance imaging (MRI) in peripheral nerve scanning. Methods A total of 42 patients with unilateral brachialplexus neuropathy, who admitted to Xinhui District People's Hospital of Jiangmen City from July 2019 to December2020 were divided into group A, group B and group C according to random number table method, with 14 patients ineach group. The group A, group B and group C received T2-3D-SPACE routine plain scan, enhanced scan and opti-mized T2-3D-SPACE sequence scan respectively. The image quality score, image background suppression score,nerve trunk contrast noise ratio (CNR) and signal-to-noise ratio (SNR), and the display of the upper and lower clavi-cles of brachial plexus of the three imaging were compared. Results The image quality score of group A (3.45±0.42)was significantly lower than that of group B (3.78±0.31) and group C (3.81±0.29), and the differences were statistical-ly significant (P<0.05); the image background inhibition score in group A (3.01±0.33) was significantly higher thanthat in group B (2.27±0.21) and group C (2.61±0.28), while the background inhibition score in group C were significant-ly higher than that in group B, and the differences were statistically significant (all P<0.05); the SNR and CNR of groupA were 14.88±1.22 and 18.13±1.68, which were significantly lower than corresponding 16.75±1.67 and 19.44±1.39 ofgroup B and 17.29±1.41 and 19.05±1.53 of group C, and the differences were statistically significant (all P<0.05); thedisplay rates of the upper and lower segments of clavicle in group A were 42.86% and 35.71%, which were signifi-cantly lower than corresponding 92.86% and 85.71% in group B and 85.71% and 78.57% in group C, and the differ-ences were statistically significant (all P<0.05). Conclusion Optimized MRI T2-3D-SPACE sequence imaging andconventional enhanced scanning T2-3D-SPACE can clearly display brachial plexus, but optimized MRI T2-3D-SPACEsequence does not need to inject contrast agent, which is more suitable for patients with contraindication of contrastagent.
      【Key words】 Brachial plexus; Magnetic resonance imaging (MRI); T2-3D fast spin echo sequence (T2-3D-SPACE);Image quality; Contrast noise ratio (CNR); Signal to noise ratio (SNR)