Table 2.

Details of the extracted feature sets used in the two-stage renal tumor classification.

Texture Features
Feature Set 1: First-order (histogram features)	6 features
Feature Set 2: First-order (percentiles)	10 features
Feature Set 3: Second-order (GLCM)	6 features
Shape Features
Feature Set 4: Spherical harmonic reconstruction errors	70 features
Functional Features
Feature Set 5: Wash-in/out slopes	2 features
Combined Features
Feature Sets 1, 2, 3, 4, and 5	94 features