Discovery and Validation of a CT-Based Radiomic Signature for Preoperative Prediction of Early Recurrence in Hypopharyngeal Carcinoma

Table 1

Selected radiomic features with their associated feature group and filter.

Radiomic feature	Radiomic class	Filter
Long run high gray level emphasis	GLRLM	Wavelet-HHH
Long run low gray level emphasis	GLRLM	Wavelet-LHL
Long run emphasis	GLRLM	Wavelet-HHH
Large dependence high gray level emphasis	GLDM	Wavelet-HHH
Minimum	First order	Wavelet-LLL
Skewness	First order	Wavelet-HLH
Total energy	First order	Square
Zone entropy	GLSZM	Wavelet-LHL
Dependence variance	GLDM	Wavelet-LLH
Total energy	First order	Exponential
Long run high gray level emphasis	GLRLM	Wavelet-LHH

Labels: GLDM: gray level dependence matrix; GLRLM: gray level run length matrix; GLSZM: gray level size zone matrix.