The relationship between the levels of gonadotropic hormones and OPG, leptin, TGF-beta1 and TGF-beta2 in Chinese adult women.

Background: The relationship between the levels of gonadotropic hormones and bone metabolism-related cytokines in Chinese women is unclear. We investigated the relationship between FSH and LH and OPG, leptin, TGF-beta1, and TGF-beta2 in Chinese women.

Methods: A cross-sectional study of 694 Chinese women, aged 20 to 82y was conducted.

The influence of center of rotation on the assessment of trabecular bone densitometric and structural properties.

The center of rotation is a physical location in the microCT scanner, defined by the axis of rotation of the sample stage. This physical location is always well defined during calibration of the instrument and fitted by an appropriate algorithm. However, in real images of limited contrast and with X-ray photon noise, this algorithm exhibits poorer precision and the optimum center of rotation cannot be always acquired.