Contrast-enhanced CT radiomics features to preoperatively identify differences between tumor and proximal tumor-adjacent and tumor-distant tissues of resectable esophageal squamous cell carcinoma

Table 2 The 20 features to differentiate tumor from proximal tumor-adjacent tissue of esophageal squamous cell carcinoma

Image type	Feature class	Feature name
Original	Shape	Elongation
Original	Shape	Maximum2DDiameterRow
Original	Shape	Maximum2DDiameterSlice
Original	Shape	SurfaceVolumeRatio
Log-sigma-1-0-mm-3D	Firstorder	Skewness
Log-sigma-1-0-mm-3D	Glcm	ClusterShade
Log-sigma-1-0-mm-3D	Glcm	Idmn
Log-sigma-1-0-mm-3D	Glcm	Idn
Log-sigma-1-5-mm-3D	Glrlm	ShortRunLowGrayLevelEmphasis
Log-sigma-1-5-mm-3D	Ngtdm	Coarseness
Log-sigma-2-0-mm-3D	Firstorder	90Percentile
Wavelet-LLH	Glcm	Correlation
Wavelet-LLH	Glam	LargeDependenceHighGrayLevelEmphasis
Wavelet-LLH	Gldm	SmallDependenceLowGrayLevelEmphasis
Wavelet-HHL	Glcm	Imc1
Wavelet-HHH	Glcm	MCC
Wavelet-HHH	Ngtdm	Coarseness
Wavelet-LLL	Firstorder	Median
Wavelet-LLL	Glcm	Correlation
Wavelet-LLL	Ngtdm	Coarseness

Glcm gray-level co-occurrence matrix, Glrlm gray-level run-length matrix, Ngtdm neighboring gray tone difference matrix, Gldm gray-level dependence matrix, Idmn inverse difference moment normalized, Idn inverse difference normalized, Imc1 informational measure of correlation 1, MCC maximal correlation coefficient

ISSN: 1470-7330