DWI and IVIM are predictors of Ki67 proliferation index: direct comparison of MRI images and pathological slices in a murine model of rhabdomyosarcoma.

• DWI and IVIM parameters are correlated with Ki67 proliferation indexes in rhabdomyosarcoma mouse models. • A specialized method ensured a strong correlation between pathological sections and MRI slices, resulting in a robust radiological-pathological correlation.