V1 (pre-NACT) and V2 (after one NACT cycle) color parametric maps of Ktrans(SSM), ve(SSM), and τi from a pCR (A, left breast, patient 12) and a non-pCR (B, right breast, patient 3) breast tumor. The maps were generated for tumor ROIs defined on multiple image slices, and the ones on the image slice through the central portion of the tumor are displayed here. For each tumor, the color scale of each DCE-MRI metric is kept the same between the two visits for easy visualization of NACT-induced changes.