Figure 9. There is difficulty in distinguishing the talar dome (TD) from the distal tibial epiphyseal edge on the B-scan (a), however a coronal reformat of the data (b) helps to identify the superior margin of the talar dome as illustrated by landmark X on both the reformatted and original images. On image (b) the width of the medial malleolus (MM) is just 3.7 mm. (c) An annotation of the reformatted data.