Table 1. Classification of radiomic features.

Category	Encoding scheme and technique
Semantic	Prostate Imaging Reporting and Data System (PIRADS)
Morphological	First order geometric descriptions
	Higher order geometric descriptions
	❖ Minkowski functionals
	❖ Fractal dimension
Statistical	First order statistics
	❖ Gray-level intensity histogram (GLIH)
	Higher order statistics
	❖ Gray-level co-occurrence matrices (GLCOM); gray-level neighborhood difference matrices (GLNDM); gray-level run length matrices (GLRLM); gray-level size zone matrices (GLSZM)
Transform-based	Fourier transform
	Gabor transform
	Wavelet transform
	Laplacian transform of Gaussian bandpass filters