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Table 2 Detailed radiomics features extracted from each ultrasound feature map and its 4 frequency components

From: Prediction of programmed cell death protein 1 in hepatocellular carcinoma patients using radiomics analysis with radiofrequency-based ultrasound multifeature maps

Kinds of high-throughput radiomics features Texture features from each ultrasound feature map Wavelet-based texture features from frequency component 1 Wavelet-based texture features from frequency component 2 Wavelet-based texture features from frequency component 3 Wavelet-based texture features from frequency component 4
Histogram 16 16 16 16 16
GLCM 13 13 13 13 13
GLRLM 22 22 22 22 22
GLSZM 13 13 13 13 13
NGTDM 5 5 5 5 5
Total 69 276