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Preoperative Evaluation of Pituitary Macroadenomas Consistency Using Radiomic Features from Multi-Parametric MRI |
Wan Tao1,2, Zhao Hui1,2, Li Deyu1,2, Ma Jun3, Wu Chunxue3, Meng Ming3, Qin Zengchang4* |
1(School of Biomedical Science and Medical Engineering, Beihang University, Beijing 100191, China) 2(Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100191, China) 3(Department of Radiology, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China) 4(School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China) |
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Abstract In order to explore the application value of image characteristics from multi-parameter magnetic resonance imaging (MP-MRI) in evaluating pituitary macroadenoma consistency, this paper presented a radiomics based computer-aided diagnosis method to accurately determine tumor consistency, thus providing an appropriate surgical approach. In this method, 6 types of texture features, a total number of 296, were extracted from tumor regions of MRIs (T1-weighted, T1-weighted contrast enhanced, T2-weighted). A feature selection method was adopted to identify important radiomic features. Two classifiers of support vector machine and random forest were utilized to distinguish soft and hard pituitary macroadenomas. The training, 10-fold cross validation and testing were performed on a total of 252 MRI images in 84 clinical studies. The experiment results showed that the feature combination of MP-MRI achieved better classification performance compared with single MRI protocol with classification accuracy, sensitivity, specificity and area under the curve of 89.80%, 90.51%, 89.88% and 94.08%, respectively. These suggested that MP-MRI features could effectively and accurately discriminate the soft from hard pituitary macroadenomas, which could be useful in improving the efficacy and prognosis of pituitary macroadenomas.
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Received: 11 July 2020
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