ERBB2 and breast cancer: In conclusion, our study demonstrated that DKI_AK, MAP_NG, MAP_NGAx, MAP_NGRad, MAP_RTOP, MAP_RTAP, and NODDI_ICVF were lower in HER2-positive breast cancer than in HER2-negative breast cancer, and DTI_RD, DTI_MD, MAP_MSD, and MAP_QIV were higher in HER2-positive breast cancer than in HER2-negative breast cancer.