Osteoporosis is a systemic special disease characterized by low bone mass and damaged bone microarchitecture, which leads to increased bone fragility and susceptibility to fractures. This is the standard set by the World Health Organization in 2017. However, currently in clinical practice, there is no direct method available to measure bone hardness. Therefore, an indirect method is used, which is the measurement of bone density. There are many methods to measure bone density, among which the gold standard is Dual-Energy X-ray Absorptiometry (DXA). Other methods include single photon, single energy X-ray, Quantitative Computed Tomography (QCT), peripheral quantitative CT, and quantitative ultrasound testing.