Chinese Journal of Magnetic Resonance >
Classification of BI-RADS 3-5 Breast Lesions Based on MRI Radiomics
Received date: 2022-01-18
Online published: 2022-04-04
The classification of the breast imaging-reporting and data system (BI-RADS) based on magnetic resonance imaging (MRI) refers to the classification of the degree of lesions according to the image signs of lesions, which is usually subjective. Moreover, the benign and malignant lesions of BI-RADS 3-5 are overlapping, which is prone to unnecessary invasive treatment due to high diagnostic categories in clinical diagnosis. To address these problems, this research applied radiomics for feature extraction and fusion of T1-weighted (T1W) and dynamic contrast-enhanced (DEC) MRI. The least absolute shrinkage and selection operator (LASSO) algorithm was used to screen out the optimal feature collection of each type of MR image. Support vector machine (SVM), random forest (RF), K-nearest neighbour (KNN) and logistic regression (LR) algorithms were applied for BI-RADS 3-5 classification, based on which the benign and malignant lesions were further classified. The results showed that the classification accuracy of breast BI-RADS 3-5 by four radiomics models based on feature fusion was 81.25%, 87.50%, 78.38%, and 81.25%, respectively. Their accuracy in distinguishing the benign and malignant breast lesions was 90.91%, 93.55%, 92.73%, and 94.55%, respectively. This indicates that the combination of radiomics and machine learning correlation algorithm has a good effect on breast MRI BI-RADS classification and benign and malignant differentiation, and feature fusion can further improve the accuracy of classification prediction.
Key words： magnetic resonance imaging; breast lesions; radiomics; BI-RADS; feature fusion; classification
Bing HAN , Jing XU , Yuanjun WANG , Zhongling WANG . Classification of BI-RADS 3-5 Breast Lesions Based on MRI Radiomics[J]. Chinese Journal of Magnetic Resonance, 2023 , 40(1) : 52 -67 . DOI: 10.11938/cjmr20222971
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