Figure 8. (a) The original B-scan at the talo-navicular joint. Sagittal and axial reformats are shown in (b) and (c), respectively. The white arrowhead in the sagittal reformat (b) indicates the dorsal aspect of the navicular (N). Its corresponding position on the original image (a) is also shown as a white arrowhead. A reformat in the axial z-plane (c) shows the mediolateral extent of the navicular (white arrow). Landmark X indicates the lateral aspect of the navicular shown on the reformatted image (c) and original image (a). These reformats and reference points were used to segment the talus (T) from the navicular (N) on the original B-scan as accurately as possible.