中外医学研究Issue(3)：44-45,46,3.DOI:10.14033/j.cnki.cfmr.2015.03.024
多b值磁共振扩散加权成像在颈部淋巴结病变中的应用价值
Value of Diffusion-weighted Imaging with Different b Values in Differential Diagnosis of Cervical Lymph Node Lesions at MRI
楚云谦 1向映光 2牟富丽3
作者信息
- 1. 广元市利州区人民医院 四川 广元 628003
- 2. 广元市中心医院
- 3. 合江县人民医院
- 折叠
摘要
Abstract
Objective:To investigate the applying value of multiple b-values diffusion weighted imaging on differentiation of benign and malignant cervical lymph node lesions.Method:55 patients with 23 benign cervical lymph node lesions and 32 malignant ones underwent diffusion-weighted imaging at 3.0 T MRI with different b values of 0,400,600,800,1000,1500 and 2000 s/mm2.All lesions were confirmed by pathology.Result:When b-value≤1000 s/mm2,the SNR of DWI increased as the b-value increased,and when b-value =1000 s/mm2,the SNR reached its climax,when b-value >1000 s/mm2,the SNR of DWI decreased as the b-value increased.With b value of 1000 s/mm2,average ADC value of benign lesion was higher than malignant lesion,among them the differences were statistically significant(P<0.05).Average ADC had an acceptable value on differentiation of benign and malignant cervical lymph node lesions with optimal cutoff point of 1.07×10-3 mm2/s,yielding a sensitivity,specificity and the area under the AUC were 85.6%,82.3% and 0.896,respectively.Conclusion:For good image quality and valid differentiation between malignant and benign lymph nodes,the optimized b value of DWI at 3.0 T for cervical lymph nodes is 1000 s/mm2.关键词
磁共振成像/扩散加权成像/b值Key words
Magnetic resonance imaging/Diffusion-weighted imaging/b value分类
医药卫生引用本文复制引用
楚云谦,向映光,牟富丽..多b值磁共振扩散加权成像在颈部淋巴结病变中的应用价值[J].中外医学研究,2015,(3):44-45,46,3.
