磁共振扩散加权与常规T_2加权对腹部淋巴结显示的比较  

Abdominal Lymph Nodes Finding on MRI: Comparison between Diffusion Weighted Imaging and Conventional T_2 Weighted Imaging

作　　者：杜竑兵 张福洲[1] 陈世孝[1] 胡鸿[1] 

机构地区：[1]川北医学院第二临床学院附属南充市中心医院,四川南充637000

出　　处：《川北医学院学报》2009年第6期575-579,共5页Journal of North Sichuan Medical College

摘　　要：目的评价磁共振扩散加权成像(diffuse weighted imaging,DWI)显示腹部淋巴结的可行性。材料和方法23例慢性乙型肝炎患者和30例肝癌患者行常规MRI序列(T1WI,T2WI)和DWI扫描,评价DWI显示淋巴结图像的质量,分别在T2WI和DWI序列统计肝炎组和肝癌组显示肿大淋巴结的枚数,以及分别在两个序列测量两组肿大淋巴结的最大长轴直径,并比较其差异。结果DWI能够清晰显示淋巴结;肝炎组在T2WI与DWI上显示淋巴结都为51枚,在T2WI与DWI上测量显示的肿大淋巴结最大长轴直径范围分别为0.8-1.7cm、0.8-1.6 cm,平均值分别为1.14±0.27cm、1.13±0.26cm。肝癌组在T2WI与DWI上显示的淋巴结都为113枚,测量在T2WI与DWI上显示的肿大淋巴结最大长轴直径范围分别为1.4-4.4cm、1.5-4.6cm,平均值分别为2.7±0.83cm、2.73±0.85 cm。两个序列显示淋巴结的大小差异无统计学意义(p>0.05)。结论DWI能准确和敏感地显示淋巴结,可作为淋巴结MRI成像的一种新手段。Objective To study the feasibility of MR diffusion - weighted imaging （DWI）for abdominal lymph node. Materials and Methods 23 patients with hepatitis （hepatltis group） and 30 patients with hepatic carcinoma（ hepatic carcinoma group） in this study were performed by MRI examination with both conventional sequence （T±WI, T2WI） and DWI. The quality of DWI for depicting lymph nodes was ranked; in the two groups, the number of enlarged lymph nodes on T2WI and DWI was calculated respectively; and the maximum long diameters of visible enlarged lymph nodes in the two sequence were measured respectively, the abilities of T2WI and DWI for depicting enlarged lymph nodes were compared. Results the quality of DWI for depicting lymph nodes was excellent, In group hepatitis, all of 51 lymph nodes depicted were shown on both T2WI and DWI; the maximum long diameters were, respectively, 1.14 ± O. 27cm （0. 8 - 1.7cm） and 1.13 ±0.26cm （0. 8 - 1.6cm） on T2WI and DWI （p 〉0. 05）. In hepatic carcinoma group, all the 113 lymph nodes depicted were shown on both T2WI and DWI; the maximum long diameters were, respectively, 2. 7 ± 0.83cm （1.4 - 4.4cm） and 2.73 ±0. 85cm （ 1.5 - 4.6cm） on T2WI and DWI （p 〉 0. 05 ）. the ability of T2WI and DWI for depicting enlarged lymph nodes was no significant difference. Conclusion MR DWI has an ability to depict abdominal enlarged lymph nodes comparable to that of T2 weighted imaging.

关 键 词：腹部淋巴结 磁共振成像 扩散加权成像 

分 类 号：R814.42[医药卫生—影像医学与核医学]