I. Nagai, Takako Tobimatsu, K. Takahashi, H. Sai, I. Mano, Takahiko Otani, H. Iio, T. Fujita, K. Horii, G. Iguchi, Hisamitsu Baba, and Kousei Yoh
A reference database for trabecular bone density, cortical thickness, and elastic modulus of trabecular bone for a novel ultrasonic bone densitometry system (LD-100) based on two longitudinal waves (fast and slow) was determined over a wide age range in a normal Japanese population. A novel ultrasonic bone densitometry system (LD-100 system) was applied to create a reference database for trabecular bone density (TBD), cortical thickness (CoTh), and elastic modulus of trabecular bone (EMTb) for this device over a wide age range in a normal Japanese population. In a comparative study between LD-100 and peripheral quantitative computed tomography (pQCT) systems, 52 individuals were examined by both systems at the same radius simultaneously. To create a reference database, a total of 2,380 healthy subjects (1,179 men, 1,201 women), ages 18โ99 years, were examined using the LD-100 system. Highly significant correlations between the LD-100 and pQCT systems were found in TBD (r = 0.877, p