Conventional MRI manifestations and radiomics for differentiating brain epithelioid glioblastoma and pleomorphic xanthoastrocytoma
10.13929/j.issn.1003-3289.2024.10.004
- VernacularTitle:常规MRI表现及影像组学鉴别颅脑上皮样胶质母细胞瘤与多形性黄色瘤型星形细胞瘤
- Author:
Hailian ZHANG
1
;
Yangyang LI
;
Dan CHENG
;
Junjie LI
;
Runqiang WANG
Author Information
1. 青海省第五人民医院放射科,青海西宁 810007
- Keywords:
brain neoplasms;
glioma;
magnetic resonance imaging;
radiomics
- From:
Chinese Journal of Medical Imaging Technology
2024;40(10):1471-1475
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare conventional MRI manifestations of brain epithelioid glioblastoma(eGBM)and pleomorphic xanthoastrocytoma(PXA),and to explore the value of radiomics model for differentiating eGBM and PXA.Methods Forty-three cases of brain eGBM(eGBM group)and 79 cases of PXA(PXA group)confirmed by surgical pathology were retrospectively analyzed,and conventional MRI maniofestations were compared between groups.The patients were divided into training set(n=85,including 30 cases of eGBM and 55 cases of PXA)and test set(n=37,including 13 cases of eGBM and 24 cases of PXA)at the ratio of 7∶3.A radiomics regression model was established based on T2WI and enhanced T1WI.Receiver operating characteristic curve was drawn to assess the value of the model for discriminating eGBM and PXA.Results Patients in eGBM group were older than in PXA group,and the proportion of minors in eGBM group was lower than that in PXA group(both P＜0.05).Compared with PXA group,eGBM group showed higher proportion of multiple lesions,with high T1WI signals and peritumoral edema,more unclear boundary and uneven signals(all P＜0.05).After administration of contrast agents,circular enhancement was more often observed in eGBM group,while lesions in PXA group tended to present wall nodule enhancement(both P＜0.05).The sensitivity,specificity,accuracy and area under the curve(AUC)of the radiomics model based on 19 selected features was 88.91％,79.94％,86.75％and 0.892 in training set,respectively,which was 84.58％,79.20％,81.12％and 0.824 in test set,respectively.Conclusion Conventional MRI manifestations of eGBM and PXA were different to a certain extent.Radiomics model was valuable for distinguishing eGBM and PXA.
