A scanner used to measure bone density using dual energy X-ray absorptiometry
Bone density, or bone mineral density, is the amount of bone mineral in bone tissue. The concept is of mass of mineral per volume of bone (relating to density in the physics sense), although clinically it is measured by proxy according to optical density per square centimetre of bone surface upon imaging.[1] Bone density measurement is used in clinical medicine as an indirect indicator of osteoporosis and fracture risk. It is measured by a procedure called densitometry, often performed in the radiology or nuclear medicine departments of hospitals or clinics. The measurement is painless and non-invasive and involves low radiation exposure. Measurements are most commonly made over the lumbar spine and over the upper part of the hip.[2] The forearm may be scanned if the hip and lumbar spine are not accessible.
There is a statistical association between poor bone density and higher probability of fracture. Fractures of the legs and pelvis due to falls are a significant public health problem, especially in elderly women, leading to substantial medical costs, inability to live independently and even risk of death.[3] Bone density measurements are used to screen people for osteoporosis risk and to identify those who might benefit from measures to improve bone strength.
^Bone+Density at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
^Cole RE (June 2008). "Improving clinical decisions for women at risk of osteoporosis: dual-femur bone mineral density testing". J Am Osteopath Assoc. 108 (6): 289–95. PMID 18587077.
^"Preventing Falls and Related Fractures | NIH Osteoporosis and Related Bone Diseases National Resource Center". www.bones.nih.gov. Retrieved 2021-03-12.
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