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• W4385492671 abstract "To develop and validate radiomics and machine learning models for identifying encrusted stents and compare their recognition performance with multiple metrics.A total of 354 patients with ureteral stent placement were enrolled from two medical institutions and divided into the training cohort (n = 189), internal validation cohort (n = 81) and external validation cohort (n = 84). Based on features selected by Wilcoxon test, Spearman Correlation Analysis and least absolute shrinkage and selection operator (LASSO) regression algorithm, six machine learning models based on radiomics features were established with six classifiers (LR, DT, SVM, RF, XGBoost, KNN). After comparison with those models, the most robust model was selected. Considering its feature importance as radscore, the combined model and a nomogram were constructed by incorporating indwelling time. Accuracy, sensitivity, specificity, area under the curve (AUC), decision curve analysis (DCA) and calibration curve were used to evaluate the recognition performance of models.1,409 radiomics features were extracted from 641 volumes of interest (VOIs) and 20 significant radiomics features were selected. Considering the superior performance (AUC 0.810, 95%CI, 0.722-0.888) in the external validation cohort, feature importance of XGBoost was used as a radscore, constructing a combined model and a nomogram with indwelling time. The accuracy, sensitivity, specificity and AUC of the combined model were 98, 100, 97.3% and 0.999 for the training cohort, 83.3, 80, 84.5% and 0.867 for the internal cohort and 78.2, 76.3, 78.8% and 0.820 for the external cohort, respectively. DCA indicates the favorable clinical utility of models.Machine learning model based on radiomics features enables to identify ureteral stent encrustation with high accuracy." @default.
• W4385492671 created "2023-08-03" @default.
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• W4385492671 date "2023-08-02" @default.
• W4385492671 modified "2023-09-24" @default.
• W4385492671 title "Identifying ureteral stent encrustation using machine learning based on CT radiomics features: a bicentric study" @default.
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• W4385492671 doi "https://doi.org/10.3389/fmed.2023.1202486" @default.
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