2. Dual-energy X-ray absorption method: X-ray tube balls pass through a device to obtain two kinds of energy, namely low-energy and high-energy photon peaks. After this photon peak penetrates the body, the scanning system sends the received signal to the computer for data processing, and obtains the bone mineral content.
3. Quantitative CT: CT can accurately select the bones in specific parts to measure the bone density, and can independently evaluate the bone density of cortical cancellous bone.
4. Ultrasonic measurement method: Because it has no radiation and is sensitive to diagnose fractures, it has been widely concerned by people. The attenuation of sound wave velocity and amplitude can reflect bone mineral content, bone structure and bone strength.
Extended data
Importance of measurement:
1, to judge whether there are signs of bone growth.
2. Evaluation of children's growth and development, growth hormone deficiency, etc.
3. Bone mineral density measurement is of great significance to the occurrence, diagnosis, treatment, prognosis and follow-up observation of diseases affecting calcium and phosphorus metabolism.
Baidu encyclopedia-bone mineral density