In order to realize the early detection of osteoporosis, development of a device that enables simple screening is desirable. We have focused on a simple bone density evaluation method using near-infrared light and have studied its reliability. In this study, we propose an optical bone density measurement method, in which bone density is evaluated by the slope of light intensity on the skin surface. A detection system of quasi-ballistic light is incorporated into this method for better accuracy, by decreasing the influence of light scattering in the skin layer.
Kaname Miura, Hidenori Matsubara, Shigeo M. Tanaka, Development of optical bone densitometry using near-infrared light, Journal of Mechanical Engineering, vol 5-4, 60-67, 2018.