Image Acquisition
After removal of the specimen from the preservative it was mounted for CT scanning. Scanning was performed using an HMXST 225 CT system (Metris X-Tek, Tring, UK). The X-rays were generated from a tungsten target using a voltage and current of 180 kV and 105 µA, respectively. The radial projections were reconstructed into a three-dimensional matrix of 1897×1830×630 (L×W×H) 124.5 µm cubic voxels.