Ultrasonic elastography and superb microvascular imaging for diagnosing cervical cancer:Comparison on single method and their combination
Objective To observe the value of shear wave elastography(SWE),superb microvascular imaging(SMI)and their combination with conventional ultrasound for diagnosing cervical cancer.Methods Data of 178 patients with cervical lesion confirmed by pathology were retrospectively analyzed.The patients were divided into malignant group(n=32)and benign group(n=146),and those in benign group were further divided into low-grade or high-grade cervical intraepithelial neoplasia subgroups,cervical leiomyosarcoma subgroup,cervical polyps subgroup and cervicitis subgroup.The manifestations of lesion on conventional ultrasound,SWE and SMI were observed,and the mean value of Young's modulus(Emean)and SMI flow index(Ratio)were collected.The optimal cut-off value of SWE Emean and SMI Ratio were obtained with receiver operating characteristic(ROC)curves,and the classification of benign or malignant lesions were predicted.The consistency of predictive results and pathology results were assessed with the Kappa test.The diagnostic efficacies of conventional ultrasound,SWE and SMI alone and their combination were compared.Results The age of patients in malignant group was higher than that in benign group(P＜0.05).SWE Emean and SMI Ratio were both higher in malignant group than those in each benign subgroup(all P＜0.05).Taken 44.35 kPa and 3.95％ as the best cut-off values,the consistency of SWE Emean classification results and pathological results was good(Kappa=0.818),while of SMI Ratio was moderate(Kappa=0.453).The efficacy of conventional ultrasound,SWE and SMI alone for classifying benign and malignant cervical lesions(AUC=0.845,0.914,0.892)were all higher than that of their combination(AUC=0.806,all adjusted P＜0.05).The sensitivity of SWE and SMI for diagnosing cervical cancer was 90.60％ and 93.78％ respectively,with specificity of 95.20％ and 72.60％,respectively.Conclusion SWE hag higher efficacy for diagnosing cervical cancer,while SMI had better sensitivity but lower specificity.Combination of conventional ultrasound,SWE and SWI did not increase the efficacy of ultrasound for diagnosing cervical cancer.
万方数据
维普
