Table 1 Summary of radiomics features.

From: Radiomics-based Prognosis Analysis for Non-Small Cell Lung Cancer

Feature group

Number of features

Description

Statistical - First order

11

ROI Size (# of pixels), ROI size (mm2), Mean gray level, Standard Deviation, Median gray level, Min ROI, Max ROI, Mean Positive Values, Uniformity, Kurtosis, Skewness

Textural - Second order

19

Contrast, Energy, Correlation, Homogeneity, Entropy, Normalized Entropy, Variance, Inverse Difference Moment, Sum of Average, Sum of Variance, Sum of Entropy, Difference of Variance, Difference of Entropy, Information Measure of Correlation, Autocorrelation, Dissimilarity, Cluster Shade, Cluster Prominence, Maximum Probability