Abstract
Objectives
To investigate whether radiomic features extracted from dynamic susceptibility contrast perfusion-weighted imaging (DSC-PWI) can improve the prediction of the molecular subtypes of adult diffuse gliomas, and to further develop and validate a multimodal radiomic model by integrating radiomic features from conventional and perfusion MRI.
Methods
We extracted 1197 radiomic features from each sequence of conventional MRI and DSC-PWI, respectively. The Boruta algorithm was used for feature selection and combination, and a three-class random forest method was applied to construct the models. We also constructed a combined model by integrating radiomic features and clinical metrics. The models’ diagnostic performance for discriminating the molecular subtypes (IDH wild type [IDHwt], IDH mutant and 1p/19q-noncodeleted [IDHmut-noncodel], and IDH mutant and 1p/19q-codeleted [IDHmut-codel]) was compared using AUCs in the validation set.
Results
We included 272 patients (training set, n = 166; validation set, n = 106) with grade II–IV gliomas (mean age, 48.7 years; range, 19–77 years). The proportions of the molecular subtypes were 66.2% IDHwt, 15.1% IDHmut-noncodel, and 18.8% IDHmut-codel. Nineteen radiomic features (13 from conventional MRI and 6 from DSC-PWI) were selected to build the multimodal radiomic model. In the validation set, the multimodal radiomic model showed better performance than the conventional radiomic model did in predicting the IDHwt and IDHmut-codel subtypes, which was comparable to the conventional radiomic model in predicting the IDHmut-noncodel subtype. The multimodal radiomic model yielded similar performance as the combined model in predicting the three molecular subtypes.
Conclusions
Adding DSC-PWI to conventional MRI can improve molecular subtype prediction in patients with diffuse gliomas.
Key Points
• The multimodal radiomic model outperformed conventional MRI when predicting both the IDH wild type and IDH mutant and 1p/19q-codeleted subtypes of gliomas.
• The multimodal radiomic model showed comparable performance to the combined model in the prediction of the three molecular subtypes.
• Radiomic features from T1-weighted gadolinium contrast-enhanced and relative cerebral blood volume images played an important role in the prediction of molecular subtypes.
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Abbreviations
- DSC-PWI:
-
Dynamic susceptibility contrast perfusion-weighted imaging
- FISH:
-
Fluorescence in situ hybridization
- FLAIR:
-
Fluid-attenuated inversion recovery
- FOV:
-
Field of view
- IDH:
-
Isocitrate dehydrogenase
- NEX:
-
Number of excite
- rCBF:
-
Relative cerebral blood flow
- rCBV:
-
Relative cerebral blood volume
- T1:
-
T1-weighted
- T1c:
-
T1-weighted gadolinium contrast-enhanced
- T2:
-
T2-weighted
- TE:
-
Echo time
- TR:
-
Repetition time
- VOI:
-
Volume of interest
- WHO:
-
World Health Organization
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Funding
This study has received funding from the National Natural Science Foundation of China (No. 82102149, 82273493, 81702465, 82173090, U1804172, U1904148), the Excellent Youth Talent Cultivation Program of Innovation in Health Science and Technology of Henan Province (YXKC2022061), the Key Program of Medical Science and Technique Foundation of Henan Province (No. SBGJ202002062), and the Science and Technology Program of Henan Province (No. 192102310390, 202102310454, 202102310113, 202102310136, 202102310138, 202102310083).
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The scientific guarantor of this publication is Jing Yan.
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Pei, D., Guan, F., Hong, X. et al. Radiomic features from dynamic susceptibility contrast perfusion-weighted imaging improve the three-class prediction of molecular subtypes in patients with adult diffuse gliomas. Eur Radiol 33, 3455–3466 (2023). https://doi.org/10.1007/s00330-023-09459-6
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DOI: https://doi.org/10.1007/s00330-023-09459-6