Fig. 1.

Digital reconstructions of human brain vasculature from MRA imaging. A. Arterial arbors are semi-manually traced from single planar sections of each image stack in horizontal, coronal or sagittal views. B. Maximum intensity projections in the same orientations reveal a fuller extent of the imaged structure. C. Embedding of the final reconstructed arborization within the original image stack enables tracing validation by facilitating critical inspection of branch correspondence and identification of incomplete sub-trees. D. Color-coded schematic of the circle of Willis and the six major arteries stemming from it. E. Complete reconstruction of the brain vasculature corresponding to panels A–C (from a 59 year-old male) and color-coded by artery according to panel D.