The preliminary research of DWIBS in lymph node metastasis of rectal cancer
10.3969/j.issn.1002-1671.2014.11.016
- VernacularTitle:DWIBS 对直肠癌淋巴结转移的初步研究
- Author:
Xuehuan LIU
;
Jun LIU
;
Jin ZHONG
;
Liang XU
;
Xiuling ZHANG
;
Caixian HAO
;
Changqing ZONG
;
Hui QIAO
- Publication Type:Journal Article
- Keywords:
diffusion-weighted imaging with background suppression;
apparent diffusion coefficient;
rectal cancer;
lymph node
- From:
Journal of Practical Radiology
2014;(11):1839-1841,1854
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the application value of diffusion-weighted imaging with background suppression (DWIBS) in lymph node metastasis of rectal cancer.Methods 30 patients with rectal cancer diagnosed by colonoscopy underwent routine MRI and DWIBS examinations.Metastatic and non-metastatic lymph nodes were confirmed by postoperative pathology.Apparent diffu-sion coefficient (ADC)values of the solid part of metastatic and non-metastatic lymph nodes were measured and compared.ROC curve analysis was used to define the threshold between the metastatic and non-metastatic lymph nodes.Results In all 73 lymph nodes,there were 52 metastatic lymph nodes and the other 21 were non-metastatic.ADC values of the solid part of metastatic and non-metastatic lymph nodes were (0.881 ± 0.094)× 10 -3 mm2/s and (1.072 ± 0.108)×10 -3 mm2/s respectively,the difference was statistically significant (P <0.05).With the threshold ADC value of 0.957×10 -3 mm2/s,the sensitivity and specificity for dif-ferentiating metastatic from non-metastatic lymph nodes were 90.5% and 80.8% respectively.The diagnostic value was excellent (Az value = 0.91 9,P <0.05).Conclusion ADC values may be used to differentiate lymph node metastasis of rectal cancer,and DWIBS has higher application value in assessing lymph node metastasis of rectal cancer.
