Two-dimensional magnetic resonance neurography in neurotmesis of the left sciatic nerve A case report

Magnetic resonance neurography （MRN） is used to determine traumatic changes within nervous trunks. A 21-year-old male was treated for neurotmesis of the left sciatic nerve. At 41 days after micro-neurosurgery, two-dimensional MRN （2-D MRN） was performed with plain and contrast scans in the left injured sciatic nerve. More than 2 years after trauma, 2-D MRN images were collected to re-examine the left sciatic nerve. Results from the first 2-D MRN examination revealed a swollen left sciatic nerve. Furthermore, TlWl revealed a local nodule with slightly high intensity, and T2WI revealed hyperintensity. The nodule was significantly enhanced. Upon 2-D MRN re-examination more than 2 years after injury, the injured left sciatic nerve trunk was thinner, and the nodule margin in the left sciatic trunk was clearer. The supero-inferior diameter was enlarged by 2 mm compared with previous films. The degree of enhancement became weaker in the nodule. 2-D MRN revealed continuity, traumatic neuroma, and atrophy of the injured sciatic nerves in detail. Thin-slice technique was crucial for this method, as well as fat-suppressed and blood flow-suppressed imaging.

Cerebral blood flow volume measurements of the carotid artery and ipsilateral branches using two-dimensional phase-contrast magnetic resonance angiography

The optimal velocity encoding of phase-contrast magnetic resonance angiography （PC MRA） in measuring cerebral blood flow volume （BFV） ranges from 60 to 80 cm/s. To verify the accuracy of two-dimensional （2D） PC MRA, the present study localized the region of interest at blood vessels of the neck using PC MRA based on three-dimensional time-of-flight sequences, and the velocity encoding was set to 80 cm/s. Results of the measurements showed that the error rate was 7.0±6.0% in the estimation of BFV in the internal carotid artery, the external carotid artery and the ipsilateral common carotid artery. There was no significant difference, and a significant correlation in BFV between internal carotid artery ＋ external carotid artery and ipsilateral common carotid artery. In addition, the BFV of the common carotid artery was correlated with that of the ipsilateral internal carotid artery. The main error was attributed to the external carotid artery and its branches. Therefore, after selecting the appropriate scanning parameters and protocols, 2D PC MRA is more accurate in the determination of BFV in the carotid arteries.

Incremental value of magnetic resonance neurography of Lumbosacral plexus over non-contributory lumbar spine magnetic resonance imaging in radiculopathy: A prospective study

AIM: To test the incremental value of 3T magnetic resonance neurography(MRN) in a series of unilateral radiculopathy patients with non-contributory magnetic resonance imaging(MRI).METHODS: Ten subjects(3 men,7 women; mean age54 year and range 22-74 year) with unilateral lumbar radiculopathy and with previous non-contributory lumbar spine MRI underwent lumbosacral(LS) plexus MRN over a period of one year. Lumbar spine MRI performed as part of the MRN LS protocol as well as bilateral L4-S1 nerves,sciatic,femoral and lateral femoral cutaneous nerves were evaluated in each subject for neuropathy findings on both anatomic(nerve signal,course and caliber alterations) and diffusion tensor imaging(DTI)tensor maps(nerve signal and caliber alterations).Minimum fractional anisotropy(FA) and mean apparent diffusion coeffcient(ADC) of L4-S2 nerve roots,sciatic and femoral nerves were recorded.RESULTS: All anatomic studies and 80% of DTI imaging received a good-excellent imaging quality grading. In a blinded evaluation,all 10 examinations demonstrated neural and/or neuromuscular abnormality corresponding to the site of radiculopathy. A number of contributory neuropathy findings including double crush syndrome were observed. On DTI tensor maps,nerve signal and caliber alterations were more conspicuous. Although individual differences were observed among neuropathic appearing nerve(lower FA and increased ADC) as compared to its contralateral counterpart,there were no significant mean differences on statistical comparison of LS plexus nerves,femoral and sciatic nerves(P > 0.05).CONCLUSION: MRN of LS plexus is useful modality for the evaluation of patients with non-contributory MRI of lumbar spine as it can incrementally delineate the etiology and provide direct objective and non-invasive evidence of neuromuscular pathology.

3T magnetic resonance neurography of pudendal nerve with cadaveric dissection correlation

AIM: To evaluate the pudendal nerve segments that could be identified on magnetic resonance neurography(MRN) before and after surgical marking of different nerve segments.METHODS: The hypothesis for this study was that pudendal nerve and its branches would be more easily seen after the surgical nerve marking. Institutional board approval was obtained. One male and one female cadaver pelvis were obtained from the anatomy board and were scanned using 3 Tesla MRI scanner using MR neurography sequences. All possible pudendal nerve branches were identified. The cadavers were then sent to the autopsy lab and were surgically dissected by a peripheral nerve surgeon and an anatomist to identify the pudendal nerve branches. Radiological markers were placed along the course of the pudendal nerve and its branches. The cadavers were then closed and rescanned using the same MRN protocol as the premarking scan. The remaining pudendal nerve branches were attempted to be identified using the radiological markers. All scans were read by an experienced musculoskeletal radiologist.RESULTS: The pre-marking MR Neurography scans clearly showed the pudendal nerve at its exit from the lumbosacral plexus in the sciatic notch, at the level of the ischial spine and in the Alcock's Canal in both cadavers. Additionally, the right hemorrhoidal branch could be identified in the male pelvis cadaver. The perineal and distal genital branches could not be identified. On post-marking scans, the markers were used as identifiable structures. The location of the perineal branch, the hemorroidal branch and the dorsal nerve to penis(in male cadaver)/clitoris(in female cadaver) could be seen. However, the visualization of these branches was suboptimal. The contralateral corresponding nerves were poorly seen despite marking on the surgical side. The nerve was best seen on axial T1W and T2W SPAIR images. The proximal segment could be seen well on 3D DW PSIF sequence. T2W SPACE was not very useful in visualization of this small nerve or its branches.CONCLUSION: Proximal pudendal nerve is easily seen on MR neurography, however it is not possible to identify distal branches of the pudendal nerve even after surgical marking.

Magnetic dynamics of two-dimensional itinerant ferromagnet Fe_(3)GeTe_(2)

Among the layered two-dimensional ferromagnetic materials(2D FMs),due to a relatively high T_(C),the van der Waals(vdW)Fe_(3)GeTe_(2)(FGT)crystal is of great importance for investigating its distinct magnetic properties.Here,we have carried out static and dynamic magnetization measurements of the FGT crystal with a Curie temperature TC≈204 K.The M-H hysteresis loops with in-plane and out-of-plane orientations show that FGT has a strong perpendicular magnetic anisotropy with the easy axis along its c-axis.Moreover,we have calculated the uniaxial magnetic anisotropy constant(K_(1))from the SQUID measurements.The dynamic magnetic properties of FGT have been probed by utilizing the high sensitivity electron-spin-resonance(ESR)spectrometer at cryogenic temperatures.Based on an approximation of single magnetic domain mode,the K_(1)and the effective damping constant(αeff)have also been determined from the out-of-plane angular dependence of ferromagnetic resonance(FMR)spectra obtained at the temperature range of 185 K to T_(C).We have found large magnetic damping with the effective damping constantαeff~0.58 along with a broad linewidth(ΔH_(pp)>1000 Oe at 9.48 GHz,H||c-axis).Our results provide useful dynamics information for the development of FGT-based spintronic devices.

Two-dimensional horizontal visibility graph analysis of human brain aging on gray matter

Characterizing the trajectory of the healthy aging brain and exploring age-related structural changes in the brain can help deepen our understanding of the mechanism of brain aging.Currently,most structural magnetic resonance imaging literature explores brain aging merely from the perspective of morphological features,which cannot fully utilize the grayscale values containing important intrinsic information about brain structure.In this study,we propose the construction of two-dimensional horizontal visibility graphs based on the pixel intensity values of the gray matter slices directly.Normalized network structure entropy(NNSE)is then introduced to quantify the overall heterogeneities of these graphs.The results demonstrate a decrease in the NNSEs of gray matter with age.Compared with the middle-aged and the elderly,the larger values of the NNSE in the younger group may indicate more homogeneous network structures,smaller differences in importance between nodes and thus a more powerful ability to tolerate intrusion.In addition,the hub nodes of different adult age groups are primarily located in the precuneus,cingulate gyrus,superior temporal gyrus,inferior temporal gyrus,parahippocampal gyrus,insula,precentral gyrus and postcentral gyrus.Our study can provide a new perspective for understanding and exploring the structural mechanism of brain aging.

磁共振神经成像对臂丛神经损伤的诊断效能及其与手术的一致性研究

目的 探讨磁共振神经成像(MRN)在臂丛神经损伤(BPI)中的诊断效能并评估其与手术的一致性。方法 回顾性分析35例BPI患者的影像资料及手术记录,以手术探查结果为对照标准,将术前MRN检查所见与手术探查结果进行比较。建立基于MRN征象的分类方法,分析M RN与手术探查结果的一致性。结果 MRN对35例患者神经损伤的定位评估与手术分型具有很高的符合率(9 1.4%),两者一致率良好(82.9%)。MRN诊断BPI的敏感度、特异度、准确度、阳性预测值、阴性预测值分别为92.7%、71.4%、90.3%、96.2%、55.6%。BPI的MRN分类与手术探查结果无明显差别,两者一致性良好(Kappa=0.743;Kappa=0.686)。结论 MRN能直观、准确地显示BPI的位置、形态及信号,MRN的神经分类方法与手术探查具有良好一致性,对BPI的诊断及治疗具有重要价值。

慢性炎性脱髓鞘性多发性神经病的磁共振神经成像特征分析

目的分析慢性炎性脱髓鞘性多发性神经病(CIDP)的磁共振神经成像特征及诊断效率,为疾病诊治提供依据。方法选取2022-06—2023-09郑州大学第二附属医院收治的72例CIDP患者为观察组,同时选取50例健康体检者为对照组。所有受试者均采用3.0T MRI进行磁共振神经成像(MRN),分析MRN诊断CIDP的效果(敏感性、特异性、阳性预测值、阴性预测值,准确率、误诊率、漏诊率),分析MRN的成像特征及诊断价值。结果MRN诊断CIDP的敏感性81.94%(59/72),特异性82.00%(41/50),阳性预测值86.76%(59/68),阴性预测值82.00%(41/50),准确率81.97%(100/122),误诊率18.00%(9/50),漏诊率18.06%(13/72)。CIDP患者的MRN特征主要表现为神经根增粗,信号增强及强化(“袖套征”)。43例患者臂丛神经(BP)和51例患者腰骶丛神经(LSP)出现增粗肥大,观察组患者BP及LSP神经根直径明显大于对照组(P<0.05),观察组患者马尾神经信号强度高于对照组(P<0.05)。结论MRN主要用于评估CIDP患者周围神经的形态、信号、强化等成像特征,具有准确率高、敏感性强的特点,一定程度上能够反映患者病情,可作为疾病诊断与治疗的辅助检查,具有一定的临床应用价值。

Neuralgic amyotrophy with hourglass-like constrictions:A case report

BACKGROUND Neuralgic amyotrophy(NA)is a rare disease with sudden upper limb pain followed by affected muscle weakness.The most commonly affected area in NA is the upper part of the brachial plexus,and the paraspinal muscles are rarely affected(1.5%),making these cases difficult to distinguish from cervical radiculopathy.CASE SUMMARY A 76-year-old male presented to the emergency department with left hip pain post-fall.After undergoing left femoral neck fracture surgery,he experienced sudden left shoulder pain for 10 days with subsequent left arm weakness.Cervical spine computed tomography revealed mild right asymmetric intervertebral disc bulging with a decreased C5-6disc space.Three weeks later,an electrodiagnostic study confirmed brachial plexopathy findings involving the cervical root.Magnetic resonance neurography was performed for a differential diagnosis.Contrast enhancement was identified at the upper trunk of the brachial plexus,including the C5 nerve root.A suprascapular nerve hourglass-like focal constriction(HLFC)was also identified,confirming NA.After being diagnosed with NA,the patient received 15 mg prednisolone,twice daily,for 3 weeks.Physical therapy was initiated,including left arm strengthening exercises and electrical stimulation therapy.Left shoulder muscle strength significantly improved one CONCLUSION NA's unique features like HLFC and paraspinal involvement are crucial for accurate diagnosis,avoiding confusion with cervical radiculopathy.

臂丛MRN在诊断脱髓鞘合并轴索损伤CIDP中的应用

目的:探讨臂丛磁共振神经成像(MRN)在诊断脱髓鞘合并轴索损伤的慢性炎性脱髓性多发性神经根神经病(CIDP)中的应用价值。方法:收集2016—2021年在我院确诊的CIDP患者29例,根据神经电生理检查分为脱髓鞘组及脱髓鞘合并轴索损伤组。在臂丛MRN图像上测量所有患者臂丛神经根(C5~C8)最大直径以及神经-肌肉T2WI信号强度比,收集所有患者的临床资料,进行组间差异性分析和组内相关性分析,并绘制受试者工作特征(ROC)曲线。结果:脱髓鞘合并轴索损伤组CIDP患者臂丛神经根最大直径大于脱髓鞘组,其中C5(P=0.011)、C6(P=0.046)、C8(P=0.001)神经根的差异具有统计学意义。ROC曲线分析结果显示,C8神经根的最大直径具有较好的诊断效能,其ROC曲线下面积(AUC)为0.851,相应的阈值为4.36 mm。脱髓鞘合并轴索损伤组CIDP患者C6(r=0.634,P=0.02)、C7(r=0.605,P=0.029)神经根最大直径与脑脊液蛋白水平呈中度正相关,C7神经根最大直径(r=-0.567,P=0.043)以及C8神经根的神经-肌肉T2WI信号强度比(r=-0.598,P=0.031)与发病年龄呈中度负相关。结论:臂丛MRN有助于识别脱髓鞘合并轴索损伤的CIDP患者,C8神经根的最大直径可能具有较好的诊断效能。

磁共振3D-SPACE神经成像显示腰骶丛肿瘤性病变的价值

目的:探讨三维可变翻转角快速自旋回波序列(three dimensional sampling perfection with application optimized contrasts by using different flip angle evolution,3D-SPACE)神经成像技术显示腰骶丛肿瘤性病变的价值。方法:回顾性分析2018年1月至2023年12月间16例累及腰骶丛神经的肿瘤性病变患者的MRI资料,所有病例均经病理检查确诊。测量病灶的最大径,统计病灶数目,观察病变累及的腰骶丛神经位置,统计受累神经数目,描述肿瘤与神经间的关系。结果:16例患者中,单发病灶10例,多发病灶6例,病灶平均最大径为(57.1±37.2) mm。累及单根神经5例,累及多根神经11例。肿瘤与神经关系,沿神经生长5例,神经受压5例,神经受肿瘤侵袭、包绕6例。结论:3D-SPACE神经成像技术能清晰、直观地显示受累神经的位置、数目及肿瘤与神经间的关系,在显示腰骶丛肿瘤性病变的定位及诊断中具有重要价值。

MRI在腰椎间盘突出症神经根压迫中的应用进展

腰椎间盘突出症(LDH)是腰腿痛的主要病因之一,确定神经根受压水平及程度对于临床医师制订合理的治疗方案及预后评估均具有重要意义。磁共振成像(MRI)作为一种非侵入性、无辐射的成像技术,已成为LDH神经根受压诊断和评估的首选方法。磁共振神经成像序列可用于研究腰骶神经根的解剖学结构和走行,弥散张量成像则有助于了解神经根的生理功能,这些定性、定量的成像技术可提供更客观、更全面的评估,用于疾病诊断和康复结果的预测。因此,全面了解MRI在LDH神经根压迫中的应用进展,可以为疾病治疗方案的制订提供重要依据。

磁共振神经成像技术对骨质疏松性腰椎骨折患者脊神经压迫的诊断效能分析

目的 探讨磁共振神经成像(MRN)技术对骨质疏松性腰椎骨折患者脊神经压迫的诊断效能。方法 选择2019年1月—2022年12月收治的骨质疏松性腰椎骨折患者200例为研究对象,均实施MRN检查,包括腰椎T1WI矢状位、T2WI矢状位、T2WI轴位、短时间反转恢复(STIR)序列、三列-多回波恢复梯度回波(3D-MERGE)序列。以手术结果为“金标准”,分析二者对脊神经压迫的诊断效能。结果 骨质疏松性腰椎骨折患者3D-MERGE序列的信噪比(SNR)、对比度噪声比(CNR)均大于STIR序列(P<0.05)。结论 磁共振神经成像技术对骨质疏松性腰椎骨折患者脊神经压迫的诊断效能显著,利于临床诊治,提升预后效果。

基于磁共振神经成像技术的正常成人骶神经解剖特征分析

目的 :利用磁共振神经成像技术探讨正常成人骶神经影像解剖特征,为骶神经调控手术治疗下尿路功能障碍性疾病提供参考。方法 :收集本院在3.0T MRI机器进行增强3D-STIR-SPACE序列扫描骶神经成像检查的成年患者,选取骶神经形态显示正常者,然后在3D骶神经后处理重建图像上对第1骶神经(S1)~第4骶神经(S4)进行观察,并分别测量每支骶神经连续走行的角度以及在骶神经管内的长度,比较男、女2组间每对及每支骶神经各测量参数差异有无统计学意义。结果 :磁共振骶神经图像中双侧S1、第2骶神经(S2)显示率均为100%,双侧第3骶神经(S3)显示率均为94.6%,双侧S4显示率分别为33.7%、29.4%。每对S1~S4向外走行角度及S1~S3在骶神经管内的长度逐渐减小,S1~S3向前走行的角度逐渐增大,差异有统计学意义。每对骶神经左、右侧走行的角度及在骶神经管内的长度差异均无统计学意义。男性右侧S1、左侧S3向前走行的角度及双侧S1~S3在骶神经管内走行的长度大于女性,差异有统计学意义。S1~S4向外走行的角度,男、女性之间无显著性差异。结论 :骶神经在骶神经管内走行的角度和长度存在性别差异,磁共振神经成像技术可为临床骶神经调控手术的神经定位提供重要参考。

磁共振神经成像技术对骨质疏松性腰椎骨折患者脊神经压迫的诊断价值

目的研究磁共振神经成像(MRN)技术对骨质疏松性腰椎骨折患者脊神经压迫的诊断价值。方法选取2018年1月至2021年12月江苏省淮安市第二人民医院收治的骨质疏松性腰椎骨折患者67例,均行磁共振成像及MRN检查,包括腰椎T1(加权成像)WI矢状位、T2WI矢状位、T2WI轴位、短时间反转恢复(STIR)序列、三维-多回波恢复梯度回波(3D-MERGE)序列。比较STIR、3D-MERGE序列的信噪比(SNR)、对比噪声比(CNR)及脊神经显示评分。以手术结果为“金标准”,分析二者对脊神经压迫的诊断效能。结果3D-MERGE序列的SNR、CNR均大于STIR序列,脊神经显示评分等级优于STIR序列(P<0.05)。STIR序列诊断显示,67例骨质疏松性腰椎骨折患者中发生脊神经压迫扭曲6例,3D-MERGE序列诊断显示为9例,手术结果显示为10例。3D-MERGE序列诊断骨质疏松性腰椎骨折患者脊神经压迫的准确度高于STIR序列(P<0.05),二者灵敏度、特异度比较,差异无统计学意义(P>0.05)。结论MRN对骨质疏松性腰椎骨折患者脊神经压迫扭曲具有较高的诊断价值,能为临床脊神经病变的诊治提供科学合理的影像学依据。

MRI在显示腮腺内面神经中的应用进展

腮腺内面神经走行复杂,与周围解剖结构难以分辨,是影像成像的难题。随着磁共振神经成像(magnetic resonance neurography,MRN)序列的应用,解剖相关MRN及功能性MRN等技术对腮腺内面神经进行成像,提高了显示率,为明确神经来源病变及评估面神经与周围病变的关系提供了帮助。本文就近年来腮腺内面神经MRN成像技术及其临床应用予以综述,旨在为腮腺内面神经MRN的完善提供多角度信息。

3D STIR SPACE序列在坐骨神经成像中的价值研究

目的探讨钆对比剂增强三维反转恢复快速自旋回波(3D STIR SPACE)序列在坐骨神经成像中的可行性与应用价值。方法收集30例患者使用3D STIR SPACE序列同时行平扫和增强扫描进行坐骨神经成像。所有图像进行最大密度投影MIP重建,且由两位高年资放射医师对MIP图进行神经显示评分和背景抑制效果评分,并在原始图中测量坐骨神经的信噪比SNR和神经与肌肉的对比噪声比CNR。坐骨神经显示评分及背景抑制评分采取Wilcoxon秩和检验,同时对增强和平扫图像的信噪比、对比噪声比进行独立样本t检验。结果平扫图像中坐骨神经显示评价评分为0.77±0.58分,背景抑制效果评价评分为1.26±0.45分;增强图像坐骨神经显示评分为1.86±0.36分,背景抑制评分为2.79±0.39分,增强序列的背景抑制效果明显好于平扫序列(P<0.01)。平扫与增强图像中神经与肌肉CNR分别为23.61±8.10和37.38±12.49,SNR分别为42.16±10.38和49.02±11.96,增强序列提高了神经对肌肉的对比噪声比(P<0.01)但整体SNR提高并不明显(P=0.051)。结论增强3D STIR SPACE序列呈现出了较好的背景抑制效果,可以很好的显示坐骨神经走行及远端分支。

正常臂丛节后神经MR神经成像术

目的 探讨正常人臂丛节后神经MR神经成像术参数及其可行性。方法 对 30例健康志愿者行双侧臂丛节后神经MR冠状位扫描 ,扫描序列包括 :常规自旋回波序列 (SE)T1加权 (T1WI)、T2加权 (T2WI,TSE)、MR神经成像术 (MRN) ,观察 3种序列对臂丛节后神经的同层显示情况 ,并计算各序列图像对比噪声比。结果 T1WI、T2WI、MRN对臂丛节后神经同层显示率分别为 5 6 .7%、5 3.3%、83.3% ;对臂丛节后神经根与锁骨下束同层显示率分别为 5 0 %、4 6 .7%、70 %。MRN对臂丛节后神经的同层显示率 ,臂丛节后神经根与锁骨下束同层显示率明显高于常规序列 (P <0 .0 1,P <0 .0 5 ) ,T1WI与T2WI序列对臂丛节后神经的显示率无明显差异 (P >0 .0 5 )。各序列图像对比噪声比分别为 :2 .0 4± 0 .97、2 .11± 1.0 1、2 3.6 8± 5 .93,MRN图像对比噪声比明显高于常规组 (P =0 .0 0 0 )。结论 MR神经成像术对臂丛节后神经的显示率及对比噪声比明显高于常规成像序列 ,使臂丛节后神经显示成为高信号 ,可作为显示臂丛病变的常规方法。

弥散加权神经成像术诊断臂丛神经病变

目的探讨弥散加权神经成像术(DW-MRN)对臂丛神经病变诊断的准确性及定量诊断价值。方法对52例受检者行常规MR序列及重T2脂肪抑制(T2WI/SPIR)和DW-MRN。其中20例臂丛神经病变患者按病理类型分为损伤组、炎症组和肿瘤组。结果与T2WI/SPIR比较,DW-MRN臂丛C7神经节的对比噪声比和病灶对比噪声比均较高(t=2.19、3.91,P均<0.05),对臂丛神经病变诊断的灵敏度亦较高(χ2=4.44,P<0.05)。臂丛神经病变的ADC值高于正常神经节和中干(t=4.80、5.69,P均<0.05);损伤组和肿瘤组的ADC值高于炎症组(F=6.99、5.28,P均<0.05)。结论DW-MRN对臂丛神经及其病变有良好的显示能力,ADC值可作为臂丛神经病变的定量诊断的参考指标。

iMSDE MR神经成像在腰骶丛神经及其病变中的应用

目的探讨iMSDE MR神经成像(iMSDE-MRN)在腰骶丛神经的成像特点及其临床应用价值,并与MR扩散加权背景抑制神经成像(DWIBS-MRN)对比分析。方法收集20例健康志愿者及30例腰骶丛神经病变的病例,分别行常规MR检查、iMSDE-MRN及DWIBS-MRN神经成像序列检查,对L_5及S_1、S_2、S_3、S_4的显示情况进行评分对比,观察分析30例腰骶丛神经病变两种神经序列上神经和病变的显示情况,显示结果与手术病理对照。结果 iMSDE-MRN和DWIBS-MRN对L_5、S_1、S_2、S_3的显示率达100%;iMSDE-MRN对S_4的显示效果明显尤于DWIBS-MRN,其差异有统计学意义(P<0.05)。对30例腰骶丛神经病变iMSDE-MRN均能清晰地显示腰骶丛神经的结构、走行及信号特征,特别是可以显示细小的神经结构,能够清楚显示病变对神经的包绕、推压等特征。iMSDE-MRN较DWIBS-MRN能更清楚的显示相关神经的细微结构及病变的信号特点。结论 iMSDE-MRN可以清楚显示腰骶丛神经及病变的信号特点,特别是对细小的神经结构的显示优于DWIBS-MRN,为腰骶丛神经及其病变的显示提供了一种新的可行性方法。