Bone is not inert. It is metabolically active tissue that secretes hormones, regulates glucose, and shapes long-term frailty risk. Loss of bone mineral density is one of the strongest predictors of decline after sixty, and the loss begins, silently, in your forties.
Quantitative ultrasound (QUS) measures bone strength at the calcaneus the heel bone using sound waves rather than X-rays. It returns Speed of Sound, Broadband Ultrasound Attenuation, a Stiffness Index, and an estimated T-score that have been validated against fracture risk in adults.
