Figure 1.

High-resolution diffusion-weighted, T₂-weighted, diffusion tensor directionally encoded colormap (DTI colormap), and track density images of embryonic mouse brains at embryonic day 11, 13, and 15. The diffusion-weighted images show the mid-sagittal plane of the mouse brain, and the T₂-weighted, DTI colormap, and TDI data show a coronal plane as indicated by the yellow dash lines in the corresponding diffusion-weighted images. The MRI data were acquired at an isotropic spatial resolution of 0.03 mm, and the diffusion MRI data were acquired with 30 diffusion encoding directions and b-value of 1300–1500 s/mm². Early cortical structures can be appreciated in the DTI colormaps and TDI data. Structural abbreviations are: CP, cortical plate; IZ, intermediate zone; NE, neuroepithelium. The color scheme used in the DTI colormaps and TDI are: red: left-right; green: ventral-dorsal; blue: rostral-caudal, as indicated by the color arrows.