磁共振的弥散张量成像技术对鉴别诊断皮肌炎和肌营养不良的价值  

Value of Diffusion Tensor Imaging in the Differential Diagnosis of Dermatomyositis and Muscular Dystrophy

作　　者：唐东 彭丹 冉君 TANG Dong;PENG Dan;RAN Jun(Department of nuclear medicine,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China)

机构地区：[1]华中科技大学同济医学院附属同济医院核医学科,武汉430030

出　　处：《神经损伤与功能重建》2024年第2期90-93,共4页Neural Injury and Functional Reconstruction

基　　金：湖北省卫生健康委面上项目(18F-NaF PET/CT显像识别冠脉易损斑块的临床应用及价值,No.WJ2021M130)。

摘　　要：目的:探讨磁共振(magnetic resonance,MR)弥散张量成像(diffusion tensor imaging,DTI)对鉴别诊断皮肌炎和肌营养不良的价值。方法:纳入经病理证实的皮肌炎患者42例和肌营养不良患者23例。所有患者均行双侧大腿常规MR及DTI成像,分别比较皮肌炎和肌营养不良患者大腿肌群的信号强度(signal intensity,SI)、表观扩散系数(apparent diffusion coefficient,ADC)、各向异性分数(fractional anisotropy,FA);采用独立样本t检验及受试者工作特征曲线(receiver operating characteristic curve,ROC)对所有参数进行分析。结果:皮肌炎与肌营养不良患者大腿肌群的ADC和FA值差异有统计学意义(P<0.01、P<0.05),SI差异无统计学意义(P>0.05)。其中DTI的参数ADC对鉴别皮肌炎和肌营养不良具有较高的诊断价值,其曲线下面积(area under the curve,AUC)、敏感性和特异性分别为0.723、54.1%和78.1%。结论:功能序列DTI作为常规MR的补充技术,有助于鉴别皮肌炎和肌营养不良的鉴别。Objective:To explore the value of magnetic resonance(MR)diffusion tensor imaging(DTI)in the differential diagnosis of dermatomyositis and muscular dystrophy.Methods:A total of 42 patients with pathologically confirmed dermatomyositis and 23 patients with muscular dystrophy were included.All patients underwent routine MR and DTI imaging of both thighs,comparing the signal intensity(SI),apparent diffusion coefficient(ADC),and fractional anisotropy(FA)of the thigh muscle groups between patients with dermatomyositis and muscular dystrophy.Independent samples t-test and receiver operating characteristic curve(ROC)analysis were used for all parameters.Results:There was a significant difference in ADC and FA values of the thigh muscle groups between patients with dermatomyositis and muscular dystrophy(P<0.01,P<0.05),while there was no significant difference in SI(P>0.05).Among them,the DTI parameter ADC had a high diagnostic value in differentiating dermatomyositis and muscular dystrophy,with an area under the curve(AUC),sensitivity,and specificity of 0.723,54.1%,and 78.1%,respectively.Conclusion:The functional sequence DTI,as a supplementary technique to conventional MR,helps to distinguish between dermatomyositis and muscular dystrophy.

关 键 词：磁共振成像 弥散张量成像 皮肌炎 肌营养不良 

分 类 号：R741[医药卫生—神经病学与精神病学] R816[医药卫生—临床医学]