Figure 4. Features significantly (p<0.05) related to treatment response. When odds ratio >1, the higher their values the higher the chance for sustained response, whereas when odds ratio <1 the higher the values the lower the chance for sustained response. a (arterial phase), e (equilibrium phase). GLCM (Gray Level Co-occurrence Matrix), GLSZM (Gray Level Size Zone Matrix), GLRLM (Gray Level Run Length Matrix), NGTDM (Neighboring Gray Tone Difference Matrix), and GLDM (Gray Level Dependence Matrix) are second order textural features.