Figure 4. (a) A multiplanar reconstruction (MPR), reconstructed from a data set from a left brachial plexus along the longitudinal plane of the plexus. The image quality improves by correcting for operator-induced misregistration (b). (c,d,e) The original B-scans from the data set of the trunk, divisions and cord level, respectively. A hyper-reflective sheath clearly outlines the brachial plexus trunks and divisions (c,d).