Abstract
Objectives
To establish a quantitative MR model that uses clinically relevant features of tumor location and tumor volume to differentiate lower grade glioma (LRGG, grades II and III) and glioblastoma (GBM, grade IV).
Methods
We extracted tumor location and tumor volume (enhancing tumor, non-enhancing tumor, peritumor edema) features from 229 The Cancer Genome Atlas (TCGA)-LGG and TCGA-GBM cases. Through two sampling strategies, i.e., institution-based sampling and repeat random sampling (10 times, 70% training set vs 30% validation set), LASSO (least absolute shrinkage and selection operator) regression and nine–machine learning method–based models were established and evaluated.
Results
Principal component analysis of 229 TCGA-LGG and TCGA-GBM cases suggested that the LRGG and GBM cases could be differentiated by extracted features. For nine machine learning methods, stack modeling and support vector machine achieved the highest performance (institution-based sampling validation set, AUC > 0.900, classifier accuracy > 0.790; repeat random sampling, average validation set AUC > 0.930, classifier accuracy > 0.850). For the LASSO method, regression model based on tumor frontal lobe percentage and enhancing and non-enhancing tumor volume achieved the highest performance (institution-based sampling validation set, AUC 0.909, classifier accuracy 0.830). The formula for the best performance of the LASSO model was established.
Conclusions
Computer-generated, clinically meaningful MRI features of tumor location and component volumes resulted in models with high performance (validation set AUC > 0.900, classifier accuracy > 0.790) to differentiate lower grade glioma and glioblastoma.
Key Points
• Lower grade glioma and glioblastoma have significant different location and component volume distributions.
• We built machine learning prediction models that could help accurately differentiate lower grade gliomas and GBM cases. We introduced a fast evaluation model for possible clinical differentiation and further analysis.
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Change history
09 March 2020
The original version of this article, published on 05 February 2020, unfortunately contained a mistake.
Abbreviations
- AUC:
-
Area under ROC
- BraTS:
-
Multimodal Brain Tumor Segmentation Challenge
- CA:
-
Classification accuracy
- FLAIR:
-
Fluid-attenuated inversion recovery
- FMRIB:
-
Functional magnetic resonance imaging of the brain
- FSL:
-
FMRIB Software Library
- GBM:
-
Glioblastoma
- IG:
-
Information gain
- KNN:
-
k-nearest neighbors algorithm
- LASSO:
-
Least absolute shrinkage and selection operator
- LGG:
-
Low-grade glioma
- LRGG:
-
Lower grade glioma
- MNI:
-
Montreal Neurological Institute
- NIfTI:
-
Neuroimaging Informatics Technology Initiative
- PCs:
-
Principal components
- PCA:
-
Principal component analysis
- RF:
-
Random forest
- SVM:
-
Support vector machine
- TCGA:
-
The Cancer Genome Atlas
- TCIA:
-
The Cancer Imaging Archive
- Volume_ED:
-
Peritumoral edema tumor volume
- Volume_ET:
-
Enhancing tumor volume
- Volume_NET:
-
Non-enhancing tumor volume
- Volume_TC:
-
Tumor core volume
- Volume_WT:
-
Whole tumor volume
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Acknowledgments
The results here are in whole or part based upon data generated by the TCGA Research Network: https://www.cancer.gov/tcga.
Funding
The authors state that this work has not received any funding.
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Guarantor
The scientific guarantor of this publication is Dr. Robert Fulbright.
Conflict of interest
The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
Statistics and biometry
No complex statistical methods were necessary for this paper.
Informed consent
Written informed consent was waived by the Institutional Review Board.
Ethical approval
Institutional Review Board approval was not required because only deidentified data is used in this study.
Study subjects or cohorts overlap
Some study subjects or cohorts have been previously reported. The TCGA-LGG and TCGA-GBM cohorts were involved in this study. Due to the enormous publishing scale, here we are not able to list or include every associated study. However, the cohort resource and include/exclude criteria have been introduced and cited in detail.
The major differences between the cohort used in our study and other study are as follows:
1. In our study, only TCGA-LGG and TCGA-GBM cases with MRI images available on TCIA were included.
2. The abovementioned cases were subsequently selected by segmentation data availability; only cases that have GLISTRboost-generated and manually checked segmentation data were selected.
Methodology
• retrospective
• diagnostic study
• multicenter study
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The original version of this article was revised: The name of E. Zeynep Erson-Omay was presented incorrectly.
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Cao, H., Erson-Omay, E.Z., Li, X. et al. A quantitative model based on clinically relevant MRI features differentiates lower grade gliomas and glioblastoma. Eur Radiol 30, 3073–3082 (2020). https://doi.org/10.1007/s00330-019-06632-8
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DOI: https://doi.org/10.1007/s00330-019-06632-8