CAJ | 학술논문

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T1WI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(PDWI FS).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T2WI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1.4～3.8 mm和1.0～3.0 mm.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.
목적 탐토정상인주관내척신경적위치、MRI신호、형태특정,제고대정상인주관내척신경MRI특정적인식.방법 대40명건강지원자단측주관절행MR검사,소용서렬위T1WI자선회파(SE),T2WI자선회파압지(FS),질자밀도가권성상자선회파압지(PDWI FS).기중13명앙와위,27명부와위,관찰주관내척신경적위치、신호급형태특정,측량재불동횡단면상척신경적장경、단경.결과 재횡단면상,근단주관내척신경위우굉골내상과후방,향원단행주우척측완굴기여지심、천굴기간극지간.주관내척신경재MRI상표현위원형혹타원형,40명(100％)재T1WI표현위등신호,17명(42.5％)재T2WI급PDWI표현위등신호,23례(57.5％)재T2WI급PDWI상적신호표현위경도증고,이굉골내상과층면위저.주부척신경적장경화단경적변화범위분별위1.4～3.8 mm화1.0～3.0 mm.결론 정상인주부척신경특정적위치、MR신호급형태특정대진단주관종합정구유중요의의.
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 healthy volunteers were scanned with MR,the sequences were as follows:T1-weighted-spin-echo,T2-weighted-spin-echo-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.