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07 May 2017 : Clinical Research  

Grading of Gliomas by Using Radiomic Features on Multiple Magnetic Resonance Imaging (MRI) Sequences

Jiang-bo Qin1BCEF, Zhenyu Liu2B, Hui Zhang1AG*, Chen Shen2C, Xiao-chun Wang1B, Yan Tan1C, Shuo Wang2B, Xiao-feng Wu1E, Jie Tian2A

DOI: 10.12659/MSM.901270

Med Sci Monit 2017; 23:2168-2178

Abstract

BACKGROUND: Gliomas are the most common primary brain neoplasms. Misdiagnosis occurs in glioma grading due to an overlap in conventional MRI manifestations. The aim of the present study was to evaluate the power of radiomic features based on multiple MRI sequences – T2-Weighted-Imaging-FLAIR (FLAIR), T1-Weighted-Imaging-Contrast-Enhanced (T1-CE), and Apparent Diffusion Coefficient (ADC) map – in glioma grading, and to improve the power of glioma grading by combining features.

MATERIAL AND METHODS: Sixty-six patients with histopathologically proven gliomas underwent T2-FLAIR and T1WI-CE sequence scanning with some patients (n=63) also undergoing DWI scanning. A total of 114 radiomic features were derived with radiomic methods by using in-house software. All radiomic features were compared between high-grade gliomas (HGGs) and low-grade gliomas (LGGs). Features with significant statistical differences were selected for receiver operating characteristic (ROC) curve analysis. The relationships between significantly different radiomic features and glial fibrillary acidic protein (GFAP) expression were evaluated.

RESULTS: A total of 8 radiomic features from 3 MRI sequences displayed significant differences between LGGs and HGGs. FLAIR GLCM Cluster Shade, T1-CE GLCM Entropy, and ADC GLCM Homogeneity were the best features to use in differentiating LGGs and HGGs in each MRI sequence. The combined feature was best able to differentiate LGGs and HGGs, which improved the accuracy of glioma grading compared to the above features in each MRI sequence. A significant correlation was found between GFAP and T1-CE GLCM Entropy, as well as between GFAP and ADC GLCM Homogeneity.

CONCLUSIONS: The combined radiomic feature had the highest efficacy in distinguishing LGGs from HGGs.

Keywords: Glioma, Magnetic Resonance Imaging, Multilocus Sequence Typing, Radiometric Dating

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750