*2.1. Ovine Ischium Scan Collection*

A single cross-sectional 2D image was taken through the top of the leg at the point of the ischium for each lamb using a Somatom Scope (Siemens, located at the SRUC-BioSS CT unit in Edinburgh, Scotland) with a slice thickness of 10 mm for a variety of breeds including Beltex, Blue Texel, Charollais, Hampshire Down, Meatlinc, Shropshire, Southdown, Suffolk and Texel as performed by Bunger et al. [12]. The images at this stage are referred to as "raw" images throughout the paper as they are unprocessed. All CT images produced from the scans are exported in the "Digital Imaging and Communications in Medicine" (DICOM) format, a unified filetype for medical imaging techniques. Such DICOM images contain additional data regarding the subject, such as age, sex and location, in addition to collection parameters such as equipment and scanning methodology used. Image dimensions used for this study were 512 × 512 pixels of an intensity value between 0 (black) and 2550 (white) where 0 typically represents low-density matter such as air and 2550 represents extremely dense matter such as metal.
