1188. Prognostic Prediction of Hypertensive Intracerebral Hemorrhage Using CT Radiomics and Machine Learning

Award: First Place Cerebrovascular Eposter Award

Authors: Xinghua Xu; Qun Wang, MD; Xiaolei Chen, MD (Beijing, China)

Introduction: Intracerebral hemorrhage remains a significant cause of morbidity and mortality throughout the world. We tried to establish radiomics-based prognostic prediction models for hypertensive intracerebral hemorrhage (HICH) using CT radiomics and machine learning. Methods: In a retrospective study of 270 patients with HICH between June 2012 and June 2017, CT images and patients’ 6-month outcome based on the modified Rankin Scale were collected. Hematoma on CT images were selected as volumes of interests (VOIs) and a total of 1029 radiomics features of the VOIs were extracted. Based on correlations with patients' outcome, radiomics features underwent dimensionality reduction analyses. Then the SVM, KNN, LR, DT, RF, and XGBoost algorithms were applied with the screened features to establish prognostic prediction models of HICH. Accuracies of all models were compared. Results: Eighteen radiomics features were screened as prognosis-associated radiomics signature of HICH based on the variance threshold, SlectKbest and LASSO regression models. Patients were randomly allocated into training (n=215) and validation (n=55) sets. Accuracies of all 6 machine learning algorithms in the validation set exceeded 80%. The sensitivity, specificity, and accuracy in the validation set were 93.3%, 92.5%, and 92.7% for the RF model and 92.3%, 88.1%, and 89.1% for the XGBoost model, respectively, which were the best two among all models. Conclusion: Taking advantage of radiomics and machine learning, we established accurate prognostic prediction models of HICH. The RF model and XGBoost model returned the best accuracies.