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正常肘管内尺神经的MRI研究 被引量:7

MRI research of ulnar nerve of cubitai tunnel
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摘要 目的探讨正常人肘管内尺神经的位置、MRI信号、形态特征,提高对正常人肘管内尺神经MRI特征的认识。方法对40名健康志愿者单侧肘关节行MR检查,所用序列为T.WI自旋回波(SE),T2WI自旋回波压脂(FS),质子密度加权成像自旋回波压脂(PDWIFS)。其中13名仰卧位,27名俯卧位,观察肘管内尺神经的位置、信号及形态特征,测量在不同横断面上尺神经的长径、短径。结果在横断面上,近端肘管内尺神经位于肱骨内上髁后方,向远端行走于尺侧腕屈肌与指深、浅屈肌间隙之间。肘管内尺神经在MRI上表现为圆形或椭圆形,40名(100%)在T1WI表现为等信号,17名(42.5%)在T:wI及PDWI表现为等信号,23例(57.5%)在T2WI及PDWI上的信号表现为轻度增高,以肱骨内上髁层面为著。肘部尺神经的长径和短径的变化范围分别为1.4~3.8mm和1.0—3.0mm。结论正常人肘部尺神经特定的位置、MR信号及形态特征对诊断肘管综合征具有重要意义。 Objective To investigate the site, MR signal types and morphological characteristics of ulnar nerve in cubital tunnel for healthy adults, in order to improve the awareness of ulnar nerve. Methods Unilateral elbow of forty heahhy volunteers were scanned with MR, the sequences were as follows: T1- weighted-spin-echo, TE-weighted-spin-eeho-fat-suppression, PD-weighted-spin-echo-fat-suppression, among 40,13 were supine ,27 were prone. The site and MR signal types and morphological characteristics of ulnar nerve were observed, the long diameter and short diameter of the ulnar nerve on different axials were respectively measured. Results On axial, ulnar nerve was posterior to the medial condyle of the humerus at proximal elbow, lied between the flexor carpi ulnaris and the flexor digitorum profunds and superficialis muscles distally. The shape of the ulnar nerve was roundness or elliptic, the signal of 40 volunteers'( 100% ) ulnar nerve was isointensity on T1 -weighted, the signal of 17 volunteers'(42. 5 % )ulnar nerve was isointense on T2-weighted or PD-weighted, the MRI signal of 23 volunteers' (57.5%) ulnar nerve was slight hyperintense on T2-weighted or PD-weighted, especially on the axial of medial condyle of humerus. The variation range of long diameter and short diameter of the ulnar nerve respectively were 1.4--3.8 mm, 1.0-- 3.0 mm. Conclusion The certain location, MR signal types and morphological characteristics of normal ulnar nerve play an important role in the diagnosis of cubital tunnel syndrome.
出处 《中华放射学杂志》 CAS CSCD 北大核心 2013年第6期534-537,共4页 Chinese Journal of Radiology
基金 江苏高校优势学科建设工程资助项目(JXl0231801)
关键词 磁共振成像 尺神经 肘管综合征 Magnetic resonance imaging Ulnar nerve Cubital tunnel syndrome
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