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Dual-energy X-ray absorptiometry is the most widely used and most thoroughly studied bone density measurement technology. The DXA scan is typically used to diagnose and follow osteoporosis , as contrasted to the nuclear bone scan , which is sensitive to certain metabolic diseases of bones in which bones are trying to heal from infections ...
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]
These different components have different x-ray attenuating properties. The standard in bone mineral density scanning developed in the 1980s is called Dual X-ray Absorptiometry, known as DXA. The DXA technique uses two different x-ray energy levels to estimate bone density. DXA scans assume a constant relationship between the amounts of lean ...
A DEXA scan (dual-energy X-ray absorptiometry) is the “gold standard” for calculating body composition because it’s low cost, low radiation, and very accurate, Dr. Busse says.
You can calculate how much body fat you have in a few ways — such as with skinfold measurements, waist circumference measurements or a dual-energy X-ray absorptiometry (DEXA) scan.
These methods include measuring waist circumference, determining the waist-to-hip ratio or using special equipment, such as a DEXA scan, which measures bone density, to figure out body fat percentage.
Not only is bone density decreased, but the microarchitecture of bone is also disrupted. The weaker spicules of trabecular bone break ("microcracks"), and are replaced by weaker bone. Common osteoporotic fracture sites, the wrist, the hip, and the spine, have a relatively high trabecular bone to cortical bone ratio.
Osteopenia is reduced bone density caused by the loss of minerals within bones. Osteoporosis is a more severe loss of bone mineral density that puts patients at risk for fractures.