Evaluation of apparent diffusion coefficient histogram parameters based on multiplexed sensitivity encoding diffusion weighted imaging in lymph node metastasis of cervical cancer
10.3969/j.issn.1002-1671.2024.09.018
- VernacularTitle:基于复合灵敏度编码扩散加权成像表观扩散系数直方图参数评估宫颈癌淋巴结转移
- Author:
Nannan BAI
1
;
Tong YE
;
Tiebao MENG
;
Weijing ZHANG
;
Haoqiang HE
;
Chuanmiao XIE
Author Information
1. 中山大学肿瘤防治中心影像科,广东 广州 510060
- Keywords:
magnetic resonance imaging;
diffusion weighted imaging;
cervical cancer;
lymph node metastasis;
histogram
- From:
Journal of Practical Radiology
2024;40(9):1476-1479
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the application value of apparent diffusion coefficient(ADC)histogram parameters of multi-plexed sensitivity encoding diffusion weighted imaging(MUSE-DWI)in evaluating lymph node metastasis of cervical cancer(CC).Methods A total of 54 patients with CC diagnosed pathologically after extensive hysterectomy and pelvic lymph node dissection were analyzed retrospectively,and 74 lymph nodes were extracted,including 28 metastatic lymph nodes and 46 non-metastatic lymph nodes.All patients underwent routine MRI examination and MUSE-DWI before surgery.Through the T2WI fat suppression images were referenced,the region of interest(ROI)covering the entire lymph nodes were drawn on the b=800 s/mm2 images of MUSE-DWI,and ADC histogram parameters were obtained including minimum,maximum,mean,median,percentiles(10 th,25 th,75 th,90 th),kurtosis,and skewness.The differences of ADC histogram parameters between the metastatic lymph nodes and the non-metastatic lymph nodes were compared.The receiver operating characteristic(ROC)curves were drawn and the area under the curve(AUC)were calculated to evaluate the diagnostic efficacy of different parameters in distinguishing lymph node metastasis.Results The mean,median,25 th and 75 th percentiles of ADC histogram of the metastatic lymph nodes were significantly lower than those of the non-metastatic lymph nodes(P＜0.05).However,there were no statistically significant differences in minimum,maximum,10 th percentile,90 th percentile,kurtosis,and skewness(P＞0.05).In the evaluation of various parameters for distinguishing lymph node metastasis,the mean had the highest diagnostic efficacy(AUC=0.718),and when the threshold was 963.07×10-6 mm2/s,the sensitivity and specificity were 0.643 and 0.717,respectively.Conclusion The ADC histogram parameters based on MUSE-DWI have high diag-nostic value in differentiating CC lymph node metastasis,and the mean has the highest diagnostic efficiency.
