Group differences in NODDI maps between first episode psychosis patients (FEP) and healthy controls (HC). Red scale colors indicate values are higher in HC, blue scale colors indicate values are higher in FEP. Abbreviations: ND: neurite density map, ODI: orientation dispersion index map, FW: extracellular free water map, ACR: anterior corona radiata, AF: arcuate fasciculus, ATR: anterior thalamic radiation, CC: corpus callosum, CST: corticospinal tract, EC: external capsule, IC: internal capsule, IFOF: inferior fronto-occipital fasciculus, ILF: inferior longitudinal fasciculus, PTR: posterior thalamic radiation, SLF: superior longitudinal fasciculus, UF: uncinate fasciculus. The color bar refers to z scores (for illustrative purposes a range from −0.4 to 0.4 was chosen). Blue/teal color range depicts areas of significantly higher diffusion values in patients compared to controls, yellow/red color range depicts areas of significantly lower diffusion values in patients compared to controls.