MR扩散加权成像在腹部淋巴结的临床应用  被引量:13

Clinical Applications of MR Diffusion-weighted Imaging for Abdominal Lymph Nodes

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作  者:唐伟[1] 赵建农[1] 张小明[2] 翟昭华[2] 曾南林[2] 

机构地区:[1]重庆医科大学附属第二临床学院放射科,重庆400016 [2]川北医学院附属医院放射科,四川637000

出  处:《放射学实践》2008年第3期241-244,共4页Radiologic Practice

摘  要:目的:探讨MRDWI显示腹部淋巴结的可行性及其在良恶性淋巴结鉴别诊断中的价值。方法:回顾性分析20例肝癌并腹部淋巴结转移(肝门、门腔间隙和腹腔干、腹主动脉旁区域淋巴结)患者和15例乙型肝炎并肝门淋巴结肿大患者的MRI资料。对比分析T2WI和DWI对显示直径>1.0cm淋巴结的能力。在表观扩散系数(ADC)图上测量肝炎组与肝癌组淋巴结的ADC值并比较其差异。结果:肝炎组和肝癌组中T2WI显示的淋巴结DWI均可显示,淋巴结在DWI上信号强度较T2WI高。肝炎组淋巴结平均ADC值(3.92±0.28)×10-3mm2/s;肝癌组淋巴结平均ADC值(3.19±0.39)×10-3mm2/s,低于肝炎组淋巴结,两组间差异有统计学意义(P<0.001)。结论:MRDWI显示腹部淋巴结的敏感性和特异性高,可作为腹部淋巴结检查及良恶性淋巴结鉴别诊断的一种辅助手段。Objective:To study the feasibility of MR diffusion-weighted imaging (DWI) for abdominal lymph nodes and its value in the differential diagnosis between benign and malignant lymph nodes. Methods: 20 patients with hepatic carcinoma and abdominal lymph node metastasis (Group Ca) and 15 patients with type P, hepatitis and periportal lymph node enlargement (Group Hepatitis) were included in this study. All of them had MR examinations and their MR data were retrospectively analyzed. The ability of MR T2 WI and DWI for predicting the nature of lymph nodes with a maximal diameter 〉1cm was noted. The ADC values of the lymph nodes from both group hepatitis and group Ca were measured on DWI, comparison between the two groups were studied. Results: All of the lymph nodes with a maximal diameter 〉1cm in Group Hepatitis (hepatic hilar region) and in group Ca (hepatic hilar,portocaval space,celiac trunk and abdominal aorta region) were depicted on both MR DWI and T2 WI. The signal intensities of lymph nodes were higher on DWI than on T2 WI. The ADC values of lymph nodes were (3. 924±0.28) )× 10^-3mm^2/s and (3. 19±0.39)×10^-3mm^2/s in group Hepatitis and group Ca,respectively. There was a significant statistical difference in these two groups (P〈0.001) for the ADC values of the lymph nodes. Conclusion: MR DWI showed high sensitivity and specificity in depicting abdominal lymph nodes, which could be used as an alterative technique in the differential diagnosis of benign or malignant lymph node.

关 键 词:磁共振成像 扩散加权成像 淋巴结 肝脏疾病 

分 类 号:R445.2[医药卫生—影像医学与核医学] R737.9[医药卫生—诊断学]

 

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