Fig. 1.

A sequence of axial images was calibrated using ImageJ. A point at the most prominent aspect of Lister's tubercle was identified. A further point 1 cm proximal to this was used to represent the metadiaphyseal junction of the radius. ( A ) “Cortex-cortex” measurements were taken from the furthest point of each cortex. ( B ) “Intramedullary” distance represents the distance between from the inner cortices. This process was repeated for each of the six radii.