Significant differences in radial kurtosis (K
) between IGA and HC subjects. Compared with the control group, the IGA group exhibited lower K⊥ in the right inferior temporal gyrus, right orbitofrontal cortex, right fusiform gyrus, bilateral insula, left anterior cingulate cortex, left median cingulate gyrus, right postcentral gyrus, left paracentral lobule, and right posterior cingulate cortex (P <0.05, AlphaSim-corrected). T-values are color-coded on the right. Blue indicates IGA group < HC. *The left part of the figure represents the patient’s right side. *HC, healthy control. IGA, internet gaming addiction.