使用磁共振神经成像诊断肘管尺神经病变。
Diagnosing ulnar neuropathy at the elbow using magnetic resonance neurography.
机构信息
Dept of Radiology and Biomedical Imaging, University of California San Francisco, 505 Parnassus Avenue, Suite M392, Box 0628, San Francisco, CA 94143-0628, USA.
出版信息
Skeletal Radiol. 2012 Apr;41(4):401-7. doi: 10.1007/s00256-011-1251-y. Epub 2011 Aug 16.
INTRODUCTION
Early diagnosis of ulnar neuropathy at the elbow is important. Magnetic resonance neurography (MRN) images peripheral nerves. We evaluated the usefulness of elbow MRN in diagnosing ulnar neuropathy at the elbow.
METHODS
The MR neurograms of 21 patients with ulnar neuropathy were reviewed retrospectively. MRN was performed prospectively on 10 normal volunteers. The MR neurograms included axial T1 and axial T2 fat-saturated and/or axial STIR sequences. The sensitivity and specificity of MRN in detecting ulnar neuropathy were determined.
RESULTS
The mean ulnar nerve size in the symptomatic and normal groups was 0.12 and 0.06 cm(2) (P < 0.001). The mean relative signal intensity in the symptomatic and normal groups was 2.7 and 1.4 (P < 0.01). When using a size of 0.08 cm(2), sensitivity was 95% and specificity was 80%.
DISCUSSION
Ulnar nerve size and signal intensity were greater in patients with ulnar neuropathy. MRN is a useful test in evaluating ulnar neuropathy at the elbow.
简介
早期诊断肘部尺神经病变很重要。磁共振神经成像（MRN）可用于显示周围神经。我们评估了肘部 MRN 在诊断肘部尺神经病变中的作用。
方法
回顾性分析 21 例尺神经病变患者的 MR 神经图。前瞻性对 10 例正常志愿者进行 MRN 检查。MR 神经图包括轴位 T1 和 T2 脂肪饱和及/或轴位短 TI 反转恢复序列。确定 MRN 检测尺神经病变的灵敏度和特异性。
结果
症状组和正常组的尺神经平均直径分别为 0.12 和 0.06cm2（P<0.001）。症状组和正常组的平均相对信号强度分别为 2.7 和 1.4（P<0.01）。当使用直径 0.08cm2 时，灵敏度为 95%，特异性为 80%。
讨论
尺神经病变患者的尺神经直径和信号强度更大。MRN 是评估肘部尺神经病变的有用检查方法。
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