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Clinical Articles
Prediction of MGMT promoter methylation in gliomas with different radiomics models based on MRI
CHEN Sixuan  XU Yue  YE Meiping  LI Yang  YU Zhixuan  QING Zhao  WANG Zhengge  ZHANG Bing  ZHANG Xin 

Cite this article as: Chen SX, Xu Y, Ye MP, et al. Prediction of MGMT promoter methylation in gliomas with different radiomics models based on MRI[J]. Chin J Magn Reson Imaging, 2022, 13(3): 1-5, 36. DOI:10.12015/issn.1674-8034.2022.03.001.


[Abstract] Objective To investigate the efficacy of different radiomics models based on MRI for predicting the status of O6-methylguanine-DNA methyltransferase (MGMT) promoter methylation in gliomas before operation.Materials and Methods The MR data of 114 patients with gliomas confirmed by pathology were analyzed retrospectively, including T1WI, T2WI, ADC and Gd-enhanced T1WI. Among them, 58 cases were MGMT promoter methylation and 56 cases were MGMT promoter unmethylation. All patients were randomly divided into training set (91 cases) and validation set (23 cases) according to the 8∶2 ratio. Three dimensional manual segmentation was performed on tumor edema zone and tumor core zone respectively on T2WI and Gd-enhanced T1WI. A total of 688 radiomics features were extracted. Principal component analysis was used for feature dimension reduction and analysis of variance was used to select features. Support vector machine (SVM), Logistic regression (LR), Lasso's Logistic regression via Lasso (LR-Lasso) and Bayesian classifier (native Bayes, NB) were used to build a diagnostic model. The validation data set was used to evaluate the accuracy and diagnostic efficiency of the model prediction with 5-folder cross validation. The ROC curve was drawn to dynamically evaluate the sensitivity and specificity of the model prediction, and the area under curve (AUC) statistical index was used to quantify the prediction efficiency of the model.Results The AUC value and accuracy of LR model were 0.90 and 91%, the sensitivity and specificity were 92% and 91%, the AUC value and accuracy of LR-Lasso model were 0.80 and 74%, the sensitivity and specificity were 67% and 82%, the AUC value and accuracy of SVM model were 0.89 and 87%, the sensitivity and specificity were 83% and 91%, the AUC value and accuracy of NB model were 0.69 and 74%, the sensitivity and specificity were 75% and 72%. The performance based on LR model was the highest.Conclusions The diagnostic model of multimodal MRI radiomics parameters could be used to predict the status of MGMT promoter methylation in glioma before operation. Among the four models, LR model has the highest prediction performance.
[Keywords] glioma;O6-methylguanine-DNA methyltransferase promoter methylation;radiomics;magnetic resonance imaging

CHEN Sixuan1   XU Yue3   YE Meiping1   LI Yang1   YU Zhixuan1   QING Zhao1, 2   WANG Zhengge1   ZHANG Bing1, 2   ZHANG Xin1*  

1 Department of Radiology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210093, China

2 Institute of brain Science, Nanjing University, Nanjing 210093, China

3 National Institute of Healthcare Data Science at Nanjing University, Nanjing 210093, China

Zhang X, E-mail: zhangxin@njglyy.com

Conflicts of interest   None.

Received  2021-09-06
Accepted  2022-02-17
DOI: 10.12015/issn.1674-8034.2022.03.001
Cite this article as: Chen SX, Xu Y, Ye MP, et al. Prediction of MGMT promoter methylation in gliomas with different radiomics models based on MRI[J]. Chin J Magn Reson Imaging, 2022, 13(3): 1-5, 36.DOI:10.12015/issn.1674-8034.2022.03.001

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