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• W4313304230 abstract "Background Preoperative diagnosis of liver fibrosis in children with pancreaticobiliary maljunction (PBM) is needed to guide clinical decision‐making and improve patient prognosis. Purpose To develop and validate an MR‐based radiomics‐clinical nomogram for identifying liver fibrosis in children with PBM. Study Type Retrospective. Population A total of 136 patients with PBM from two centers (center A: 111 patients; center B: 25 patients). Cases from center A were randomly divided into training (74 patients) and internal validation (37 patients) sets. Cases from center B were assigned to the external validation set. Liver fibrosis was determined by histopathological examination. Field Strength/Sequence A 3.0 T (two vendors)/ T1 ‐weighted imaging and T2 ‐weighted imaging. Assessment Clinical factors associated with liver fibrosis were evaluated. A total of 3562 radiomics features were extracted from segmented liver parenchyma. Maximum relevance minimum redundancy and least absolute shrinkage and selection operator were recruited to screen radiomics features. Based on the selected variables, multivariate logistic regression was used to construct the clinical model, radiomics model, and combined model. The combined model was visualized as a nomogram to show the impact of the radiomics signature and key clinical factors on the individual risk of developing liver fibrosis. Statistical Tests Mann–Whitney U and chi‐squared tests were used to compare clinical factors. P < 0.05 was considered statistically significant in the final models. Results Two clinical factors and four radiomics features were selected as they were associated with liver fibrosis in the training (AUC, 0.723, 0.927), internal validation (AUC, 0.718, 0.885), and external validation (AUC, 0.737, 0.865) sets. The radiomics‐clinical nomogram yielded the best performance in the training (AUC, 0.977), internal validation (AUC, 0.921), and external validation (AUC, 0.878) sets, with good calibration ( P > 0.05). Data Conclusion Our radiomic‐based nomogram is a noninvasive, accurate, and preoperative diagnostic tool that is able to detect liver fibrosis in PBM children. Evidence Level 3. Technical Efficacy Stage 2." @default.
• W4313304230 created "2023-01-06" @default.
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• W4313304230 date "2022-12-30" @default.
• W4313304230 modified "2023-09-26" @default.
• W4313304230 title "Development of an <scp>MRI‐Based Radiomics‐Clinical</scp> Model to Diagnose Liver Fibrosis Secondary to Pancreaticobiliary Maljunction in Children" @default.
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• W4313304230 doi "https://doi.org/10.1002/jmri.28586" @default.
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