FIG. 3.

Endogenous BOLD-contrast venograms at 9.4 T demonstrating various 2D reconstructions from one 3D dataset. Data were acquired with TE = 20 ms and the fraction of inspired oxygen = 30% (systemic arterial oxygen saturation level = 90%) from the same animal shown in Fig. 2. Image reconstructions from single-pixel thick (59 μm) sections are shown along coronal (a), axial (b), and sagittal (c) directions. Minimum-intensity projections of 1-mm thick slabs are shown along coronal (d) and axial (e) directions, where projection slabs were centered at the planes of a and b, respectively. Images a and d are centered ~0.5 mm posterior to the reconstruction of Fig. 2a. Green arrows in d and e indicate intracortical vessels that have visible branches. For a reconstruction from the dorsal cortical surface (f), pixels across a slab thickness of 1 mm were averaged. Colored ticks represent slice or slab centers for reconstructions with borders of the same color. The same intracortical vein (marked by small red circles) is seen in a coronal view (a) and as it drains to the cortical surface (f). A = anterior; D = dorsal; R = right; Amy = amygdala; Aq = aqueduct; CC = corpus callosum; Cor = cortex; D3V = dorsal third ventricle; GCC = genu corpus callosum; Hip = hippocampus; IC = internal capsule; SCC = splenium corpus callosum; Tha = thalamus; 3V = third ventricle.