Sample source images (MT-weighted [MT-w], reference without saturation, T1-weighted [T1-w], and proton density–weighted [PD-w]) and a reconstructed MPF map obtained from the brain of a healthy 25-week fetus. Sample source images (MT-weighted [MT-w], reference without saturation, T1-weighted [T1-w], and proton density–weighted [PD-w]) and a reconstructed MPF map obtained from the brain of a healthy 25-week fetus. Source data are presented after averaging the 3 consecutive image blocks. The MPF map is presented with a gray-scale range corresponding to MPF values from 0% to 10%. V.L. Yarnykh et al. AJNR Am J Neuroradiol 2018;39:1341-1348 ©2018 by American Society of Neuroradiology