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Erschienen in: European Radiology 10/2021

30.03.2021 | Imaging Informatics and Artificial Intelligence

MRI-based radiomics signature for pretreatment prediction of pathological response to neoadjuvant chemotherapy in osteosarcoma: a multicenter study

verfasst von: Haimei Chen, Xiao Zhang, Xiaohong Wang, Xianyue Quan, Yu Deng, Ming Lu, Qingzhu Wei, Qiang Ye, Quan Zhou, Zhiming Xiang, Changhong Liang, Wei Yang, Yinghua Zhao

Erschienen in: European Radiology | Ausgabe 10/2021

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Abstract

Objective

To develop and validate a radiomics signature based on magnetic resonance imaging (MRI) from multicenter datasets for preoperative prediction of pathologic response to neoadjuvant chemotherapy (NAC) in patients with osteosarcoma.

Methods

We retrospectively enrolled 102 patients with histologically confirmed osteosarcoma who received chemotherapy before treatment from 4 hospitals (68 in the primary cohort and 34 in the external validation cohort). Quantitative imaging features were extracted from contrast-enhanced fat-suppressed T1-weighted images (CE FS T1WI). Four classification methods, i.e., the least absolute shrinkage and selection operator logistic regression (LASSO-LR), support vector machine (SVM), Gaussian process (GP), and Naive Bayes (NB) algorithm, were compared for feature selection and radiomics signature construction. The predictive performance of the radiomics signatures was assessed with the area under receiver operating characteristics curve (AUC), calibration curve, and decision curve analysis (DCA).

Results

Thirteen radiomics features selected based on the LASSO-LR classifier were adopted to construct the radiomics signature, which was significantly associated with the pathologic response. The prediction model achieved the best performance between good and poor responders with an AUC of 0.882 (95% CI, 0.837−0.918) in the primary cohort. Calibration curves showed good agreement. Similarly, findings were validated in the external validation cohort with good performance (AUC, 0.842 [95% CI, 0.793−0.883]) and good calibration. DCA analysis confirmed the clinical utility of the selected radiomics signature.

Conclusion

The constructed CE FS T1WI-radiomics signature with excellent performance could provide a potential tool to predict pathologic response to NAC in patients with osteosarcoma.

Key Points

• The radiomics signature based on multicenter contrast-enhanced MRI was useful to predict response to NAC.
• The prediction model obtained with the LASSO-LR classifier achieved the best performance.
• The baseline clinical characteristics were not associated with response to NAC.
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Metadaten
Titel
MRI-based radiomics signature for pretreatment prediction of pathological response to neoadjuvant chemotherapy in osteosarcoma: a multicenter study
verfasst von
Haimei Chen
Xiao Zhang
Xiaohong Wang
Xianyue Quan
Yu Deng
Ming Lu
Qingzhu Wei
Qiang Ye
Quan Zhou
Zhiming Xiang
Changhong Liang
Wei Yang
Yinghua Zhao
Publikationsdatum
30.03.2021
Verlag
Springer Berlin Heidelberg
Erschienen in
European Radiology / Ausgabe 10/2021
Print ISSN: 0938-7994
Elektronische ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-021-07748-6

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