Bodycomp Imaging makes use of Hologic DXA scanners. These devices use a process called x-ray absorptiometry to take a picture of the full body while measuring the amount of tissue per pixel. The human body can be thought of as consisting of three density ranges of tissue: the most dense is the bone mineral content. The lean mass containing non-fatty muscle and organ structures is where almost all calories are burned and power is generated. The fat mass is composed of both essential fatty tissue and also storage fat. This allows us to consider the ratio of muscle to fat to bone and to assess where and how much muscle, fat and bone tissue change over time.