Abstract
Objectives
The introduction of the 2016 WHO classification of CNS tumors has made the combined molecular and histopathological characterization of tumors a pivotal part of glioma patient management. Recent publications on radiogenomics-based prediction of the mutational status have demonstrated the predictive potential of imaging-based, non-invasive tissue characterization algorithms. Hence, the aim of this study was to assess the potential of multiparametric 18F-FET PET-MRI including MR fingerprinting accelerated with machine learning and radiomic algorithms to predict tumor grading and mutational status of patients with cerebral gliomas.
Materials and methods
42 patients with suspected primary brain tumor without prior surgical or systemic treatment or biopsy underwent an 18F-FET PET-MRI examination. To differentiate the mutational status and the WHO grade of the cerebral tumors, support vector machine and random forest were trained with the radiomics signature of the multiparametric PET-MRI data including MR fingerprinting. Surgical sampling served as a gold standard for histopathological reference and assessment of mutational status.
Results
The 5-fold cross-validated area under the curve in predicting the ATRX mutation was 85.1%, MGMT mutation was 75.7%, IDH1 was 88.7%, and 1p19q was 97.8%. The area under the curve of differentiating low-grade glioma vs. high-grade glioma was 85.2%.
Conclusion
18F-FET PET-MRI and MR fingerprinting enable high-quality imaging-based tumor decoding and phenotyping for differentiation of low-grade vs. high-grade gliomas and for prediction of the mutational status of ATRX, IDH1, and 1p19q. These initial results underline the potential of 18F-FET PET-MRI to serve as an alternative to invasive tissue characterization.
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Acknowledgments
We would like to thank the MR fingerprinting team Dres, M. Nittka, J. Pfeuffer, and G. Koerzdoerfer, Siemens Healthcare, Erlangen, for providing the prototype MRF sequence.
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Conceived and designed the experiments: Johannes Haubold, Lale Umutlu, Aydin Demircioglu. Performed the experiments: Johannes Haubold, Aydin Demircioglu, Lale Umutlu. Analyzed the data: Aydin Demircioglu, Johannes Haubold, Lale Umutlu, Marcel Gratz, Felix Nensa. Contributed reagents/materials/analysis tools: Martin Glas, Karsten Wrede, Ulrich Sure, Gerald Antoch, Kathy Keyvani, Mathias Nittka, Stephan Kannengiesser, Vikas Gulani, Mark Griswold, Ken Herrmann, Michael Forsting, Felix Nensa. Wrote the paper: Johannes Haubold, Lale Umutlu, Aydin Demircioglu. Patient recruitments: Karsten Wrede, Martin Glas. Manuscript editing: Johannes Haubold, Lale Umutlu, Aydin Demircioglu, Marcel Gratz, Martin Glas, Karsten Wrede, Ulrich Sure, Gerald Antoch, Kathy Keyvani, Mathias Nittka, Stephan Kannengiesser, Vikas Gulani, Mark Griswold, Ken Herrmann, Michael Forsting, Felix Nensa. Statistics: Aydin Demircioglu. The manuscript has been seen and approved by all authors.
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This study was conducted in accordance with all guidelines set forth by the approving institutional review board of the University Hospital Essen. All examinations were performed after written informed consent was obtained from all patients.
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There was no conflict of interest apart from the in the disclaimer mentioned funding of the study.
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This study was partially supported by Siemens Healthcare. Siemens Healthcare had no role in the study design, data collection, data analysis, data interpretation, or writing of the report.
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Haubold, J., Demircioglu, A., Gratz, M. et al. Non-invasive tumor decoding and phenotyping of cerebral gliomas utilizing multiparametric 18F-FET PET-MRI and MR Fingerprinting. Eur J Nucl Med Mol Imaging 47, 1435–1445 (2020). https://doi.org/10.1007/s00259-019-04602-2
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DOI: https://doi.org/10.1007/s00259-019-04602-2