Table 2.

List of selected stable radiomic features grouped by features class and image type: shape and size, first order statistics (FOS), and textural. The red bold names refer to features that are not stable in the random parameter variations test.

Stable features
Image type	Shape and size	FOS	Textural
T1‐weighted and T2‐weighted	‐Elongation ‐Flatness ‐Least axis length ‐Major axis length ‐Maximum two‐dimensional (2D) diameter (column) ‐Maximum 2D diameter (row) ‐Maximum 2D diameter (slice) ‐Maximum three‐dimensional diameter ‐Mesh volume ‐Minor axis length ‐Sphericity ‐Surface area ‐Surface to volume ratio ‐Voxel volume	‐10th percentile ‐90th percentile ‐Energy ‐Entropy ‐Kurtosis ‐Maximum ‐Mean ‐Median ‐Minimum ‐Skewness ‐Root mean squared ‐Total energy ‐Uniformity	‐Autocorrelation ‐Inverse difference ‐Inverse difference moment ‐Inverse difference normalized ‐Joint average ‐Joint energy ‐Joint entropy ‐Maximum probability ‐Sum average ‐Sum entropy ‐Sum squares ‐Gray level non‐uniformity (GLRLM) ‐Gray level non‐uniformity normalized ‐(GLRLM) ‐High gray level run emphasis (GLRLM) ‐Run length non‐uniformity ‐Run length non‐uniformity normalized ‐Run percentage ‐Short run emphasis	‐Short run high gray level emphasis ‐Large area emphasis ‐Zone percentage ‐Zone variance ‐Coarseness ‐Strength ‐Dependence non‐uniformity ‐Dependence non‐uniformity normalized ‐Dependence variance ‐Gray level non‐uniformity (GLDM) ‐High gray level emphasis (GLDM) ‐Large dependence emphasis ‐Large dependence low gray level emphasis ‐Small dependence emphasis
T1‐weighted only			‐Cluster shade ‐Sum squares ‐Long run low gray level emphasis ‐Low gray level run emphasis ‐Short run low gray level emphasis ‐High gray level zone emphasis	‐Large area high gray level emphasis ‐Large dependence high gray level emphasis ‐Low gray level emphasis (GLDM) ‐Small dependence high gray level emphasis
T2‐weighted only		‐Inter‐quartile range ‐Mean absolute deviation ‐Range ‐Robust mean absolute deviation